639364264 has 32 divisors (see below), whose sum is σ = 1494619200. Its totient is φ = 249102720.

The previous prime is 639364261. The next prime is 639364267. The reversal of 639364264 is 462463936.

639364264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (639364261) and next prime (639364267).

It is a self number, because there is not a number n which added to its sum of digits gives 639364264.

It is not an unprimeable number, because it can be changed into a prime (639364261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518349 + ... + 519580.

It is an arithmetic number, because the mean of its divisors is an integer number (46706850).

Almost surely, 2^639364264 is an apocalyptic number.

It is an amenable number.

639364264 is an abundant number, since it is smaller than the sum of its proper divisors (855254936).

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

639364264 is a wasteful number, since it uses less digits than its factorization.

639364264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037953 (or 1037949 counting only the distinct ones).

The product of its digits is 559872, while the sum is 43.

The square root of 639364264 is about 25285.6533235746. The cubic root of 639364264 is about 861.4884373771.

The spelling of 639364264 in words is "six hundred thirty-nine million, three hundred sixty-four thousand, two hundred sixty-four".