397372290 has 32 divisors (see below), whose sum is σ = 1089936000. Its totient is φ = 90827904.

The previous prime is 397372271. The next prime is 397372301. The reversal of 397372290 is 92273793.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 945915 + ... + 946334.

It is an arithmetic number, because the mean of its divisors is an integer number (34060500).

Almost surely, 2^397372290 is an apocalyptic number.

397372290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397372290 is an abundant number, since it is smaller than the sum of its proper divisors (692563710).

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

397372290 is a wasteful number, since it uses less digits than its factorization.

397372290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892266.

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 397372290 is about 19934.1990057288. The cubic root of 397372290 is about 735.1893260255.

The spelling of 397372290 in words is "three hundred ninety-seven million, three hundred seventy-two thousand, two hundred ninety".