639030496 has 48 divisors (see below), whose sum is σ = 1426194000. Its totient is φ = 279410688.

The previous prime is 639030479. The next prime is 639030499. The reversal of 639030496 is 694030936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639030499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32521 + ... + 48328.

It is an arithmetic number, because the mean of its divisors is an integer number (29712375).

Almost surely, 2^639030496 is an apocalyptic number.

It is an amenable number.

639030496 is an abundant number, since it is smaller than the sum of its proper divisors (787163504).

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

639030496 is a wasteful number, since it uses less digits than its factorization.

639030496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80891 (or 80883 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 639030496 is about 25279.0525138898. The cubic root of 639030496 is about 861.3385033786.

The spelling of 639030496 in words is "six hundred thirty-nine million, thirty thousand, four hundred ninety-six".