396691660 has 12 divisors (see below), whose sum is σ = 833052528. Its totient is φ = 158676656.

The previous prime is 396691637. The next prime is 396691661. The reversal of 396691660 is 66196693.

It is a super-2 number, since 2×396691660² = 314728546227111200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 396691660.

It is not an unprimeable number, because it can be changed into a prime (396691661) 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 3 ways as a sum of consecutive naturals, for example, 9917272 + ... + 9917311.

It is an arithmetic number, because the mean of its divisors is an integer number (69421044).

Almost surely, 2^396691660 is an apocalyptic number.

It is an amenable number.

396691660 is an abundant number, since it is smaller than the sum of its proper divisors (436360868).

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

396691660 is a wasteful number, since it uses less digits than its factorization.

396691660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19834592 (or 19834590 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 396691660 is about 19917.1197716939. The cubic root of 396691660 is about 734.7693354267.

The spelling of 396691660 in words is "three hundred ninety-six million, six hundred ninety-one thousand, six hundred sixty".