396398691 has 40 divisors (see below), whose sum is σ = 671298320. Its totient is φ = 231087168.

The previous prime is 396398659. The next prime is 396398699. The reversal of 396398691 is 196893693.

It is not a de Polignac number, because 396398691 - 2⁵ = 396398659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396398699) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10101 + ... + 29913.

It is an arithmetic number, because the mean of its divisors is an integer number (16782458).

Almost surely, 2^396398691 is an apocalyptic number.

396398691 is a deficient number, since it is larger than the sum of its proper divisors (274899629).

396398691 is a wasteful number, since it uses less digits than its factorization.

396398691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19857 (or 19848 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 396398691 is about 19909.7637103005. The cubic root of 396398691 is about 734.5884076230.

The spelling of 396398691 in words is "three hundred ninety-six million, three hundred ninety-eight thousand, six hundred ninety-one".