397688130 has 80 divisors (see below), whose sum is σ = 1222119360. Its totient is φ = 90898848.

The previous prime is 397688117. The next prime is 397688149. The reversal of 397688130 is 31886793.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29400 + ... + 40739.

It is an arithmetic number, because the mean of its divisors is an integer number (15276492).

Almost surely, 2^397688130 is an apocalyptic number.

397688130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397688130 is an abundant number, since it is smaller than the sum of its proper divisors (824431230).

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

397688130 is a wasteful number, since it uses less digits than its factorization.

397688130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70165 (or 70156 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 397688130 is about 19942.1194961819. The cubic root of 397688130 is about 735.3840558460.

The spelling of 397688130 in words is "three hundred ninety-seven million, six hundred eighty-eight thousand, one hundred thirty".