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230472020 = 22547245183
BaseRepresentation
bin11011011110010…
…11100101010100
3121001200012011202
431233023211110
5433000101040
634511452032
75465660042
oct1557134524
9531605152
10230472020
11109106049
1265227018
133899609c
1422875392
1515378015
hexdbcb954

230472020 has 24 divisors (see below), whose sum is σ = 494290944. Its totient is φ = 90226976.

The previous prime is 230471999. The next prime is 230472031. The reversal of 230472020 is 20274032.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 230471983 and 230472001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121652 + ... + 123531.

It is an arithmetic number, because the mean of its divisors is an integer number (20595456).

Almost surely, 2230472020 is an apocalyptic number.

230472020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230472020 is an abundant number, since it is smaller than the sum of its proper divisors (263818924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230472020 is a wasteful number, since it uses less digits than its factorization.

230472020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245239 (or 245237 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 230472020 is about 15181.3049504975. The cubic root of 230472020 is about 613.1114161183. Note that the first 3 decimals are identical.

The spelling of 230472020 in words is "two hundred thirty million, four hundred seventy-two thousand, twenty".

Divisors: 1 2 4 5 10 20 47 94 188 235 470 940 245183 490366 980732 1225915 2451830 4903660 11523601 23047202 46094404 57618005 115236010 230472020