639076532 has 30 divisors (see below), whose sum is σ = 1162343490. Its totient is φ = 307443120.

The previous prime is 639076523. The next prime is 639076541. The reversal of 639076532 is 235670936.

It is an interprime number because it is at equal distance from previous prime (639076523) and next prime (639076541).

It can be written as a sum of positive squares in only one way, i.e., 624300196 + 14776336 = 24986^2 + 3844^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 639076532.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 3693998 + ... + 3694170.

It is an arithmetic number, because the mean of its divisors is an integer number (38744783).

Almost surely, 2^639076532 is an apocalyptic number.

639076532 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

639076532 is a deficient number, since it is larger than the sum of its proper divisors (523266958).

639076532 is an frugal number, since it uses more digits than its factorization.

639076532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 41.

The square root of 639076532 is about 25279.9630537705. The cubic root of 639076532 is about 861.3591865997.

The spelling of 639076532 in words is "six hundred thirty-nine million, seventy-six thousand, five hundred thirty-two".