428862856 has 32 divisors (see below), whose sum is σ = 841463640. Its totient is φ = 204691968.

The previous prime is 428862793. The next prime is 428862869. The reversal of 428862856 is 658268824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 409414756 + 19448100 = 20234^2 + 4410^2 .

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, 2020 + ... + 29356.

Almost surely, 2^428862856 is an apocalyptic number.

It is an amenable number.

428862856 is a deficient number, since it is larger than the sum of its proper divisors (412600784).

428862856 is a wasteful number, since it uses less digits than its factorization.

428862856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27433 (or 27429 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 49.

The square root of 428862856 is about 20709.0042252157. The cubic root of 428862856 is about 754.1182964911.

The spelling of 428862856 in words is "four hundred twenty-eight million, eight hundred sixty-two thousand, eight hundred fifty-six".