642925430 has 32 divisors (see below), whose sum is σ = 1365258240. Its totient is φ = 213320160.

The previous prime is 642925429. The next prime is 642925441. The reversal of 642925430 is 34529246.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 145970 + ... + 150309.

It is an arithmetic number, because the mean of its divisors is an integer number (42664320).

Almost surely, 2^642925430 is an apocalyptic number.

642925430 is an abundant number, since it is smaller than the sum of its proper divisors (722332810).

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

642925430 is a wasteful number, since it uses less digits than its factorization.

642925430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296324.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 642925430 is about 25355.9742467135. The cubic root of 642925430 is about 863.0849320723.

The spelling of 642925430 in words is "six hundred forty-two million, nine hundred twenty-five thousand, four hundred thirty".