256857102 has 16 divisors (see below), whose sum is σ = 570793680. Its totient is φ = 85619016.

The previous prime is 256857101. The next prime is 256857113. The reversal of 256857102 is 201758652.

It is a happy number.

256857102 is a `hidden beast` number, since 25 + 68 + 571 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256857101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2378253 + ... + 2378360.

It is an arithmetic number, because the mean of its divisors is an integer number (35674605).

Almost surely, 2^256857102 is an apocalyptic number.

256857102 is an abundant number, since it is smaller than the sum of its proper divisors (313936578).

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

256857102 is a wasteful number, since it uses less digits than its factorization.

256857102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756624 (or 4756618 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 256857102 is about 16026.7620560112. The cubic root of 256857102 is about 635.6682588183.

The spelling of 256857102 in words is "two hundred fifty-six million, eight hundred fifty-seven thousand, one hundred two".