397497976 has 8 divisors (see below), whose sum is σ = 745308720. Its totient is φ = 198748984.

The previous prime is 397497967. The next prime is 397498007. The reversal of 397497976 is 679794793.

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

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, 24843616 + ... + 24843631.

It is an arithmetic number, because the mean of its divisors is an integer number (93163590).

Almost surely, 2^397497976 is an apocalyptic number.

It is an amenable number.

397497976 is a deficient number, since it is larger than the sum of its proper divisors (347810744).

397497976 is a wasteful number, since it uses less digits than its factorization.

397497976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49687253 (or 49687249 counting only the distinct ones).

The product of its digits is 18003384, while the sum is 61.

The square root of 397497976 is about 19937.3512784422. The cubic root of 397497976 is about 735.2668295552.

The spelling of 397497976 in words is "three hundred ninety-seven million, four hundred ninety-seven thousand, nine hundred seventy-six".