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68570040 = 233571141181
BaseRepresentation
bin1000001011001…
…00101110111000
311210000201102010
410011210232320
5120023220130
610445405520
71461556440
oct405445670
9153021363
1068570040
1135784760
121ab698a0
131128a9b6
14916d120
1560470b0
hex4164bb8

68570040 has 256 divisors, whose sum is σ = 264176640. Its totient is φ = 13824000.

The previous prime is 68570017. The next prime is 68570053. The reversal of 68570040 is 4007586.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 378750 + ... + 378930.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 268570040 is an apocalyptic number.

68570040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68570040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132088320).

68570040 is an abundant number, since it is smaller than the sum of its proper divisors (195606600).

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

68570040 is a wasteful number, since it uses less digits than its factorization.

68570040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 68570040 is about 8280.7028687183. The cubic root of 68570040 is about 409.3028804058.

The spelling of 68570040 in words is "sixty-eight million, five hundred seventy thousand, forty".