396635920 has 40 divisors (see below), whose sum is σ = 962277696. Its totient is φ = 151755648.

The previous prime is 396635909. The next prime is 396635923. The reversal of 396635920 is 29536693.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (396635923) 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 in 7 ways as a sum of consecutive naturals, for example, 105942 + ... + 109621.

Almost surely, 2^396635920 is an apocalyptic number.

It is an amenable number.

396635920 is an abundant number, since it is smaller than the sum of its proper divisors (565641776).

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

396635920 is a wasteful number, since it uses less digits than its factorization.

396635920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215599 (or 215593 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 43.

The square root of 396635920 is about 19915.7204238260. The cubic root of 396635920 is about 734.7349191405.

The spelling of 396635920 in words is "three hundred ninety-six million, six hundred thirty-five thousand, nine hundred twenty".