397872870 has 16 divisors (see below), whose sum is σ = 954894960. Its totient is φ = 106099424.

The previous prime is 397872859. The next prime is 397872911. The reversal of 397872870 is 78278793.

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, 6631185 + ... + 6631244.

It is an arithmetic number, because the mean of its divisors is an integer number (59680935).

Almost surely, 2^397872870 is an apocalyptic number.

397872870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397872870 is an abundant number, since it is smaller than the sum of its proper divisors (557022090).

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

397872870 is a wasteful number, since it uses less digits than its factorization.

397872870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13262439.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The square root of 397872870 is about 19946.7508632358. The cubic root of 397872870 is about 735.4979087283.

The spelling of 397872870 in words is "three hundred ninety-seven million, eight hundred seventy-two thousand, eight hundred seventy".