642845862 has 16 divisors (see below), whose sum is σ = 1428546480. Its totient is φ = 214281936.

The previous prime is 642845849. The next prime is 642845897. The reversal of 642845862 is 268548246.

642845862 is a `hidden beast` number, since 64 + 2 + 8 + 4 + 586 + 2 = 666.

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, 5952223 + ... + 5952330.

It is an arithmetic number, because the mean of its divisors is an integer number (89284155).

Almost surely, 2^642845862 is an apocalyptic number.

642845862 is an abundant number, since it is smaller than the sum of its proper divisors (785700618).

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

642845862 is a wasteful number, since it uses less digits than its factorization.

642845862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11904564 (or 11904558 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The square root of 642845862 is about 25354.4051793766. The cubic root of 642845862 is about 863.0493256749.

The spelling of 642845862 in words is "six hundred forty-two million, eight hundred forty-five thousand, eight hundred sixty-two".