397478750 has 20 divisors (see below), whose sum is σ = 745036512. Its totient is φ = 158991000.

The previous prime is 397478737. The next prime is 397478761. The reversal of 397478750 is 57874793.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 157742 + ... + 160241.

Almost surely, 2^397478750 is an apocalyptic number.

397478750 is a deficient number, since it is larger than the sum of its proper divisors (347557762).

397478750 is an equidigital number, since it uses as much as digits as its factorization.

397478750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318005 (or 317990 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 50.

The square root of 397478750 is about 19936.8691122754. The cubic root of 397478750 is about 735.2549750144.

The spelling of 397478750 in words is "three hundred ninety-seven million, four hundred seventy-eight thousand, seven hundred fifty".