397330656 has 24 divisors (see below), whose sum is σ = 1042993224. Its totient is φ = 132443520.

The previous prime is 397330643. The next prime is 397330673. The reversal of 397330656 is 656033793.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069335 + ... + 2069526.

It is an arithmetic number, because the mean of its divisors is an integer number (43458051).

Almost surely, 2^397330656 is an apocalyptic number.

It is an amenable number.

397330656 is an abundant number, since it is smaller than the sum of its proper divisors (645662568).

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

397330656 is a wasteful number, since it uses less digits than its factorization.

397330656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138874 (or 4138866 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 42.

The square root of 397330656 is about 19933.1546926220. The cubic root of 397330656 is about 735.1636490620.

The spelling of 397330656 in words is "three hundred ninety-seven million, three hundred thirty thousand, six hundred fifty-six".