642980424 has 32 divisors (see below), whose sum is σ = 1659306240. Its totient is φ = 207412800.

The previous prime is 642980417. The next prime is 642980453. The reversal of 642980424 is 424089246.

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, 431367 + ... + 432854.

It is an arithmetic number, because the mean of its divisors is an integer number (51853320).

Almost surely, 2^642980424 is an apocalyptic number.

It is an amenable number.

642980424 is an abundant number, since it is smaller than the sum of its proper divisors (1016325816).

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

642980424 is a wasteful number, since it uses less digits than its factorization.

642980424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864261 (or 864257 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 642980424 is about 25357.0586622345. The cubic root of 642980424 is about 863.1095399752.

The spelling of 642980424 in words is "six hundred forty-two million, nine hundred eighty thousand, four hundred twenty-four".