397431416 has 8 divisors (see below), whose sum is σ = 745183920. Its totient is φ = 198715704.

The previous prime is 397431323. The next prime is 397431431. The reversal of 397431416 is 614134793.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 397431416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24839456 + ... + 24839471.

It is an arithmetic number, because the mean of its divisors is an integer number (93147990).

Almost surely, 2^397431416 is an apocalyptic number.

It is an amenable number.

397431416 is a deficient number, since it is larger than the sum of its proper divisors (347752504).

397431416 is a wasteful number, since it uses less digits than its factorization.

397431416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49678933 (or 49678929 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 397431416 is about 19935.6819798070. The cubic root of 397431416 is about 735.2257877596.

The spelling of 397431416 in words is "three hundred ninety-seven million, four hundred thirty-one thousand, four hundred sixteen".