402857 has 16 divisors (see below), whose sum is σ = 524160. Its totient is φ = 300672.

The previous prime is 402851. The next prime is 402859. The reversal of 402857 is 758204.

It is a cyclic number.

It is not a de Polignac number, because 402857 - 2⁸ = 402601 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402857.

It is not an unprimeable number, because it can be changed into a prime (402851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1613 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2⁴⁰²⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

402857 is a deficient number, since it is larger than the sum of its proper divisors (121303).

402857 is a wasteful number, since it uses less digits than its factorization.

402857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 402857 is about 634.7101700777. The cubic root of 402857 is about 73.8556352732.

The spelling of 402857 in words is "four hundred two thousand, eight hundred fifty-seven".