397689630 has 32 divisors (see below), whose sum is σ = 1027875744. Its totient is φ = 97892736.

The previous prime is 397689587. The next prime is 397689631. The reversal of 397689630 is 36986793.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397689631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509469 + ... + 510248.

It is an arithmetic number, because the mean of its divisors is an integer number (32121117).

Almost surely, 2^397689630 is an apocalyptic number.

397689630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397689630 is an abundant number, since it is smaller than the sum of its proper divisors (630186114).

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

397689630 is a wasteful number, since it uses less digits than its factorization.

397689630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019740.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 397689630 is about 19942.1571049874. The cubic root of 397689630 is about 735.3849804187.

The spelling of 397689630 in words is "three hundred ninety-seven million, six hundred eighty-nine thousand, six hundred thirty".