642704412 has 48 divisors (see below), whose sum is σ = 1804087040. Its totient is φ = 173964672.

The previous prime is 642704407. The next prime is 642704429. The reversal of 642704412 is 214407246.

It is a super-2 number, since 2×642704412² = 826137922408531488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642704412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199753 + ... + 202944.

Almost surely, 2^642704412 is an apocalyptic number.

It is an amenable number.

642704412 is an abundant number, since it is smaller than the sum of its proper divisors (1161382628).

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

642704412 is a wasteful number, since it uses less digits than its factorization.

642704412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402730 (or 402728 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 642704412 is about 25351.6155698212. The cubic root of 642704412 is about 862.9860200474.

The spelling of 642704412 in words is "six hundred forty-two million, seven hundred four thousand, four hundred twelve".