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378385975 = 52111375949
BaseRepresentation
bin10110100011011…
…011011000110111
3222100222222222101
4112203123120313
51233331322400
6101314042531
712243141052
oct2643333067
9870888871
10378385975
11184652a90
12a6879447
1360514636
1438379a99
152334456a
hex168db637

378385975 has 12 divisors (see below), whose sum is σ = 511853400. Its totient is φ = 275189600.

The previous prime is 378385951. The next prime is 378385981. The reversal of 378385975 is 579583873.

It is a de Polignac number, because none of the positive numbers 2k-378385975 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 687700 + ... + 688249.

It is an arithmetic number, because the mean of its divisors is an integer number (42654450).

Almost surely, 2378385975 is an apocalyptic number.

378385975 is a deficient number, since it is larger than the sum of its proper divisors (133467425).

378385975 is a wasteful number, since it uses less digits than its factorization.

378385975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375970 (or 1375965 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 55.

The square root of 378385975 is about 19452.1457685264. The cubic root of 378385975 is about 723.2886946528.

The spelling of 378385975 in words is "three hundred seventy-eight million, three hundred eighty-five thousand, nine hundred seventy-five".

Divisors: 1 5 11 25 55 275 1375949 6879745 15135439 34398725 75677195 378385975