397426872 has 32 divisors (see below), whose sum is σ = 994320000. Its totient is φ = 132375264.

The previous prime is 397426859. The next prime is 397426889. The reversal of 397426872 is 278624793.

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, 30453 + ... + 41499.

It is an arithmetic number, because the mean of its divisors is an integer number (31072500).

Almost surely, 2^397426872 is an apocalyptic number.

It is an amenable number.

397426872 is an abundant number, since it is smaller than the sum of its proper divisors (596893128).

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

397426872 is a wasteful number, since it uses less digits than its factorization.

397426872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12555 (or 12551 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 397426872 is about 19935.5680129762. The cubic root of 397426872 is about 735.2229857007. Note that the first 3 decimals are identical.

The spelling of 397426872 in words is "three hundred ninety-seven million, four hundred twenty-six thousand, eight hundred seventy-two".