397786630 has 32 divisors (see below), whose sum is σ = 744285024. Its totient is φ = 152937216.

The previous prime is 397786601. The next prime is 397786643. The reversal of 397786630 is 36687793.

It is a congruent number.

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, 24234 + ... + 37186.

It is an arithmetic number, because the mean of its divisors is an integer number (23258907).

Almost surely, 2^397786630 is an apocalyptic number.

397786630 is a deficient number, since it is larger than the sum of its proper divisors (346498394).

397786630 is a wasteful number, since it uses less digits than its factorization.

397786630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13080.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 397786630 is about 19944.5889905007. The cubic root of 397786630 is about 735.4447645141. Note that the first 3 decimals are identical.

The spelling of 397786630 in words is "three hundred ninety-seven million, seven hundred eighty-six thousand, six hundred thirty".