397230818 has 16 divisors (see below), whose sum is σ = 610384896. Its totient is φ = 193779600.

The previous prime is 397230787. The next prime is 397230829. The reversal of 397230818 is 818032793.

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, 96980 + ... + 100992.

It is an arithmetic number, because the mean of its divisors is an integer number (38149056).

Almost surely, 2^397230818 is an apocalyptic number.

397230818 is a deficient number, since it is larger than the sum of its proper divisors (213154078).

397230818 is a wasteful number, since it uses less digits than its factorization.

397230818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 397230818 is about 19930.6502151836. The cubic root of 397230818 is about 735.1020685993.

The spelling of 397230818 in words is "three hundred ninety-seven million, two hundred thirty thousand, eight hundred eighteen".