397951788 has 24 divisors (see below), whose sum is σ = 999981808. Its totient is φ = 122446656.

The previous prime is 397951777. The next prime is 397951823. The reversal of 397951788 is 887159793.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275331 + ... + 1275642.

Almost surely, 2^397951788 is an apocalyptic number.

It is an amenable number.

397951788 is an abundant number, since it is smaller than the sum of its proper divisors (602030020).

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

397951788 is a wasteful number, since it uses less digits than its factorization.

397951788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550993 (or 2550991 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 57.

The square root of 397951788 is about 19948.7289820680. The cubic root of 397951788 is about 735.5465341319.

The spelling of 397951788 in words is "three hundred ninety-seven million, nine hundred fifty-one thousand, seven hundred eighty-eight".