639076 has 6 divisors (see below), whose sum is σ = 1118390. Its totient is φ = 319536.

The previous prime is 639053. The next prime is 639083. The reversal of 639076 is 670936.

It can be written as a sum of positive squares in only one way, i.e., 599076 + 40000 = 774^2 + 200^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79881 + ... + 79888.

2⁶³⁹⁰⁷⁶ is an apocalyptic number.

It is an amenable number.

639076 is a deficient number, since it is larger than the sum of its proper divisors (479314).

639076 is a wasteful number, since it uses less digits than its factorization.

639076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159773 (or 159771 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 639076 is about 799.4222914080. The cubic root of 639076 is about 86.1358947587.

The spelling of 639076 in words is "six hundred thirty-nine thousand, seventy-six".