397996515 has 48 divisors (see below), whose sum is σ = 829920000. Its totient is φ = 172362816.

The previous prime is 397996483. The next prime is 397996541. The reversal of 397996515 is 515699793.

397996515 is a `hidden beast` number, since 39 + 7 + 9 + 96 + 515 = 666.

It is not a de Polignac number, because 397996515 - 2⁵ = 397996483 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27265 + ... + 39234.

It is an arithmetic number, because the mean of its divisors is an integer number (17290000).

Almost surely, 2^397996515 is an apocalyptic number.

397996515 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

397996515 is an abundant number, since it is smaller than the sum of its proper divisors (431923485).

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

397996515 is a wasteful number, since it uses less digits than its factorization.

397996515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66536 (or 66533 counting only the distinct ones).

The product of its digits is 2296350, while the sum is 54.

The square root of 397996515 is about 19949.8499994361. The cubic root of 397996515 is about 735.5740898630.

The spelling of 397996515 in words is "three hundred ninety-seven million, nine hundred ninety-six thousand, five hundred fifteen".