391135396 has 24 divisors (see below), whose sum is σ = 701648640. Its totient is φ = 190680672.

The previous prime is 391135373. The next prime is 391135417. The reversal of 391135396 is 693531193.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114765 + ... + 118123.

It is an arithmetic number, because the mean of its divisors is an integer number (29235360).

Almost surely, 2^391135396 is an apocalyptic number.

It is an amenable number.

391135396 is a deficient number, since it is larger than the sum of its proper divisors (310513244).

391135396 is a wasteful number, since it uses less digits than its factorization.

391135396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083 (or 4081 counting only the distinct ones).

The product of its digits is 65610, while the sum is 40.

The square root of 391135396 is about 19777.1432719693. The cubic root of 391135396 is about 731.3226761381.

The spelling of 391135396 in words is "three hundred ninety-one million, one hundred thirty-five thousand, three hundred ninety-six".