397166020 has 24 divisors (see below), whose sum is σ = 862810200. Its totient is φ = 153388032.

The previous prime is 397165999. The next prime is 397166041. The reversal of 397166020 is 20661793.

It is an interprime number because it is at equal distance from previous prime (397165999) and next prime (397166041).

It can be written as a sum of positive squares in 4 ways, for example, as 14807104 + 382358916 = 3848^2 + 19554^2 .

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, 341805 + ... + 342964.

It is an arithmetic number, because the mean of its divisors is an integer number (35950425).

Almost surely, 2^397166020 is an apocalyptic number.

It is an amenable number.

397166020 is an abundant number, since it is smaller than the sum of its proper divisors (465644180).

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

397166020 is a wasteful number, since it uses less digits than its factorization.

397166020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684807 (or 684805 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 397166020 is about 19929.0245621807. The cubic root of 397166020 is about 735.0620954217.

The spelling of 397166020 in words is "three hundred ninety-seven million, one hundred sixty-six thousand, twenty".