397911330 has 24 divisors (see below), whose sum is σ = 1034569692. Its totient is φ = 106109664.

The previous prime is 397911329. The next prime is 397911341. The reversal of 397911330 is 33119793.

It can be written as a sum of positive squares in 2 ways, for example, as 390734289 + 7177041 = 19767^2 + 2679^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2210529 + ... + 2210708.

Almost surely, 2^397911330 is an apocalyptic number.

397911330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397911330 is an abundant number, since it is smaller than the sum of its proper divisors (636658362).

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

397911330 is a wasteful number, since it uses less digits than its factorization.

397911330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421250 (or 4421247 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 36.

The square root of 397911330 is about 19947.7149067255. The cubic root of 397911330 is about 735.5216066984.

The spelling of 397911330 in words is "three hundred ninety-seven million, nine hundred eleven thousand, three hundred thirty".