396691720 has 64 divisors (see below), whose sum is σ = 906163200. Its totient is φ = 156280320.

The previous prime is 396691699. The next prime is 396691733. The reversal of 396691720 is 27196693.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1046491 + ... + 1046869.

It is an arithmetic number, because the mean of its divisors is an integer number (14158800).

Almost surely, 2^396691720 is an apocalyptic number.

It is an amenable number.

396691720 is an abundant number, since it is smaller than the sum of its proper divisors (509471480).

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

396691720 is a wasteful number, since it uses less digits than its factorization.

396691720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 396691720 is about 19917.1212779357. The cubic root of 396691720 is about 734.7693724716.

The spelling of 396691720 in words is "three hundred ninety-six million, six hundred ninety-one thousand, seven hundred twenty".