397970790 has 32 divisors (see below), whose sum is σ = 1091577600. Its totient is φ = 90964704.

The previous prime is 397970773. The next prime is 397970801. The reversal of 397970790 is 97079793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 947340 + ... + 947759.

It is an arithmetic number, because the mean of its divisors is an integer number (34111800).

Almost surely, 2^397970790 is an apocalyptic number.

397970790 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397970790 is an abundant number, since it is smaller than the sum of its proper divisors (693606810).

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

397970790 is a wasteful number, since it uses less digits than its factorization.

397970790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895116.

The product of its (nonzero) digits is 750141, while the sum is 51.

The square root of 397970790 is about 19949.2052473275. The cubic root of 397970790 is about 735.5582412727.

The spelling of 397970790 in words is "three hundred ninety-seven million, nine hundred seventy thousand, seven hundred ninety".