397307676864 has 168 divisors, whose sum is σ = 1226073483840. Its totient is φ = 113215947264.

The previous prime is 397307676847. The next prime is 397307676881. The reversal of 397307676864 is 468676703793.

It is an interprime number because it is at equal distance from previous prime (397307676847) and next prime (397307676881).

It is a tau number, because it is divible by the number of its divisors (168).

It is a junction number, because it is equal to n+sod(n) for n = 397307676795 and 397307676804.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3509919 + ... + 3621345.

Almost surely, 2^397307676864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397307676864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (613036741920).

397307676864 is an abundant number, since it is smaller than the sum of its proper divisors (828765806976).

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

397307676864 is a wasteful number, since it uses less digits than its factorization.

397307676864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111835 (or 111818 counting only the distinct ones).

The product of its (nonzero) digits is 192036096, while the sum is 66.

The spelling of 397307676864 in words is "three hundred ninety-seven billion, three hundred seven million, six hundred seventy-six thousand, eight hundred sixty-four".