397277294464 has 64 divisors (see below), whose sum is σ = 813219810480. Its totient is φ = 193213440000.

The previous prime is 397277294443. The next prime is 397277294497. The reversal of 397277294464 is 464492772793.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a junction number, because it is equal to n+sod(n) for n = 397277294396 and 397277294405.

It is a congruent number.

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, 1176714 + ... + 1476214.

Almost surely, 2^397277294464 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 397277294464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406609905240).

397277294464 is an abundant number, since it is smaller than the sum of its proper divisors (415942516016).

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

397277294464 is a wasteful number, since it uses less digits than its factorization.

397277294464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299799 (or 299787 counting only the distinct ones).

The product of its digits is 128024064, while the sum is 64.

The spelling of 397277294464 in words is "three hundred ninety-seven billion, two hundred seventy-seven million, two hundred ninety-four thousand, four hundred sixty-four".