397815768 has 96 divisors (see below), whose sum is σ = 1296172800. Its totient is φ = 107676864.

The previous prime is 397815757. The next prime is 397815791. The reversal of 397815768 is 867518793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11196 + ... + 30347.

It is an arithmetic number, because the mean of its divisors is an integer number (13501800).

Almost surely, 2^397815768 is an apocalyptic number.

397815768 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

397815768 is an abundant number, since it is smaller than the sum of its proper divisors (898357032).

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

397815768 is a wasteful number, since it uses less digits than its factorization.

397815768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41581 (or 41574 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 397815768 is about 19945.3194509389. The cubic root of 397815768 is about 735.4627212651.

The spelling of 397815768 in words is "three hundred ninety-seven million, eight hundred fifteen thousand, seven hundred sixty-eight".