399790615 has 16 divisors (see below), whose sum is σ = 580537152. Its totient is φ = 258015744.

The previous prime is 399790597. The next prime is 399790619. The reversal of 399790615 is 516097993.

It is not a de Polignac number, because 399790615 - 2⁹ = 399790103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399790619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335364 + ... + 336553.

It is an arithmetic number, because the mean of its divisors is an integer number (36283572).

Almost surely, 2^399790615 is an apocalyptic number.

399790615 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

399790615 is a deficient number, since it is larger than the sum of its proper divisors (180746537).

399790615 is a wasteful number, since it uses less digits than its factorization.

399790615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671946.

The product of its (nonzero) digits is 459270, while the sum is 49.

The square root of 399790615 is about 19994.7646897882. The cubic root of 399790615 is about 736.6777137996.

The spelling of 399790615 in words is "three hundred ninety-nine million, seven hundred ninety thousand, six hundred fifteen".