396006656 has 18 divisors (see below), whose sum is σ = 790466922. Its totient is φ = 198003200.

The previous prime is 396006647. The next prime is 396006703. The reversal of 396006656 is 656600693.

It can be written as a sum of positive squares in only one way, i.e., 304153600 + 91853056 = 17440^2 + 9584^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 773195 + ... + 773706.

It is an arithmetic number, because the mean of its divisors is an integer number (43914829).

Almost surely, 2^396006656 is an apocalyptic number.

It is an amenable number.

396006656 is a deficient number, since it is larger than the sum of its proper divisors (394460266).

396006656 is an equidigital number, since it uses as much as digits as its factorization.

396006656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546917 (or 1546903 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 396006656 is about 19899.9159797221. The cubic root of 396006656 is about 734.3461604754.

The spelling of 396006656 in words is "three hundred ninety-six million, six thousand, six hundred fifty-six".