396728064 has 72 divisors (see below), whose sum is σ = 1173215120. Its totient is φ = 132240384.

The previous prime is 396728053. The next prime is 396728071. The reversal of 396728064 is 460827693.

It is a tau number, because it is divible by the number of its divisors (72).

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 7 ways as a sum of consecutive naturals, for example, 21787 + ... + 35610.

Almost surely, 2^396728064 is an apocalyptic number.

It is an amenable number.

396728064 is an abundant number, since it is smaller than the sum of its proper divisors (776487056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

396728064 is an equidigital number, since it uses as much as digits as its factorization.

396728064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57422 (or 57402 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 396728064 is about 19918.0336378870. The cubic root of 396728064 is about 734.7918110902.

The spelling of 396728064 in words is "three hundred ninety-six million, seven hundred twenty-eight thousand, sixty-four".