396665628 has 12 divisors (see below), whose sum is σ = 925553160. Its totient is φ = 132221872.

The previous prime is 396665627. The next prime is 396665629. The reversal of 396665628 is 826566693.

It is an interprime number because it is at equal distance from previous prime (396665627) and next prime (396665629).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396665623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16527723 + ... + 16527746.

It is an arithmetic number, because the mean of its divisors is an integer number (77129430).

Almost surely, 2^396665628 is an apocalyptic number.

It is an amenable number.

396665628 is an abundant number, since it is smaller than the sum of its proper divisors (528887532).

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

396665628 is a wasteful number, since it uses less digits than its factorization.

396665628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33055476 (or 33055474 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 51.

The square root of 396665628 is about 19916.4662528271. The cubic root of 396665628 is about 734.7532625455.

The spelling of 396665628 in words is "three hundred ninety-six million, six hundred sixty-five thousand, six hundred twenty-eight".