397799715 has 32 divisors (see below), whose sum is σ = 650327616. Its totient is φ = 207567360.

The previous prime is 397799693. The next prime is 397799729. The reversal of 397799715 is 517997793.

It is not a de Polignac number, because 397799715 - 2⁵ = 397799683 is a prime.

It is a super-2 number, since 2×397799715² = 316489226508162450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 525117 + ... + 525873.

It is an arithmetic number, because the mean of its divisors is an integer number (20322738).

Almost surely, 2^397799715 is an apocalyptic number.

397799715 is a deficient number, since it is larger than the sum of its proper divisors (252527901).

397799715 is a wasteful number, since it uses less digits than its factorization.

397799715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479.

The product of its digits is 3750705, while the sum is 57.

The square root of 397799715 is about 19944.9170216374. The cubic root of 397799715 is about 735.4528284597.

It can be divided in two parts, 39779 and 9715, that added together give a palindrome (49494).

The spelling of 397799715 in words is "three hundred ninety-seven million, seven hundred ninety-nine thousand, seven hundred fifteen".