639380204 has 6 divisors (see below), whose sum is σ = 1118915364. Its totient is φ = 319690100.

The previous prime is 639380167. The next prime is 639380213. The reversal of 639380204 is 402083936.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79922522 + ... + 79922529.

It is an arithmetic number, because the mean of its divisors is an integer number (186485894).

Almost surely, 2^639380204 is an apocalyptic number.

It is an amenable number.

639380204 is a deficient number, since it is larger than the sum of its proper divisors (479535160).

639380204 is a wasteful number, since it uses less digits than its factorization.

639380204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159845055 (or 159845053 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 639380204 is about 25285.9685201101. The cubic root of 639380204 is about 861.4955965779.

The spelling of 639380204 in words is "six hundred thirty-nine million, three hundred eighty thousand, two hundred four".