642853804 has 12 divisors (see below), whose sum is σ = 1125652528. Its totient is φ = 321238800.

The previous prime is 642853787. The next prime is 642853829. The reversal of 642853804 is 408358246.

It is a super-2 number, since 2×642853804² = 826522026634540832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39192 + ... + 53119.

Almost surely, 2^642853804 is an apocalyptic number.

It is an amenable number.

642853804 is a deficient number, since it is larger than the sum of its proper divisors (482798724).

642853804 is a wasteful number, since it uses less digits than its factorization.

642853804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94056 (or 94054 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 642853804 is about 25354.5617986192. The cubic root of 642853804 is about 863.0528798237.

The spelling of 642853804 in words is "six hundred forty-two million, eight hundred fifty-three thousand, eight hundred four".