396639008 has 12 divisors (see below), whose sum is σ = 780883110. Its totient is φ = 198319488.

The previous prime is 396639007. The next prime is 396639031. The reversal of 396639008 is 800936693.

It can be written as a sum of positive squares in only one way, i.e., 393149584 + 3489424 = 19828^2 + 1868^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 396639008.

It is not an unprimeable number, because it can be changed into a prime (396639007) 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 as a sum of consecutive naturals, namely, 6197453 + ... + 6197516.

Almost surely, 2^396639008 is an apocalyptic number.

It is an amenable number.

396639008 is a deficient number, since it is larger than the sum of its proper divisors (384244102).

396639008 is a wasteful number, since it uses less digits than its factorization.

396639008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12394979 (or 12394971 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 396639008 is about 19915.7979503710. The cubic root of 396639008 is about 734.7368258896.

The spelling of 396639008 in words is "three hundred ninety-six million, six hundred thirty-nine thousand, eight".