397894406 has 32 divisors (see below), whose sum is σ = 749582400. Its totient is φ = 157405248.

The previous prime is 397894379. The next prime is 397894417. The reversal of 397894406 is 604498793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13391 + ... + 31226.

It is an arithmetic number, because the mean of its divisors is an integer number (23424450).

Almost surely, 2^397894406 is an apocalyptic number.

397894406 is a deficient number, since it is larger than the sum of its proper divisors (351687994).

397894406 is a wasteful number, since it uses less digits than its factorization.

397894406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44653 (or 44639 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 397894406 is about 19947.2906932245. The cubic root of 397894406 is about 735.5111787938.

The spelling of 397894406 in words is "three hundred ninety-seven million, eight hundred ninety-four thousand, four hundred six".