397915008 has 64 divisors (see below), whose sum is σ = 1091089920. Its totient is φ = 128355840.

The previous prime is 397914961. The next prime is 397915009. The reversal of 397915008 is 800519793.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397915009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4810 + ... + 28617.

It is an arithmetic number, because the mean of its divisors is an integer number (17048280).

Almost surely, 2^397915008 is an apocalyptic number.

It is an amenable number.

397915008 is an abundant number, since it is smaller than the sum of its proper divisors (693174912).

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

397915008 is a wasteful number, since it uses less digits than its factorization.

397915008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33475 (or 33463 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 397915008 is about 19947.8070975233. The cubic root of 397915008 is about 735.5238728985.

The spelling of 397915008 in words is "three hundred ninety-seven million, nine hundred fifteen thousand, eight".