42857856 has 64 divisors (see below), whose sum is σ = 126500400. Its totient is φ = 14284800.

The previous prime is 42857821. The next prime is 42857869. The reversal of 42857856 is 65875824.

42857856 is a `hidden beast` number, since 4 + 28 + 578 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

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, 2745 + ... + 9656.

Almost surely, 2^42857856 is an apocalyptic number.

It is an amenable number.

42857856 is an abundant number, since it is smaller than the sum of its proper divisors (83642544).

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

42857856 is a wasteful number, since it uses less digits than its factorization.

42857856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12424 (or 12406 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 42857856 is about 6546.5911740386. The cubic root of 42857856 is about 349.9533434406.

The spelling of 42857856 in words is "forty-two million, eight hundred fifty-seven thousand, eight hundred fifty-six".