399228557585 has 32 divisors (see below), whose sum is σ = 563137747200. Its totient is φ = 267866323200.

The previous prime is 399228557573. The next prime is 399228557587. The reversal of 399228557585 is 585755822993.

It is a de Polignac number, because none of the positive numbers 2^k-399228557585 is a prime.

It is a super-2 number, since 2×399228557585² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (399228557587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1156691 + ... + 1461639.

It is an arithmetic number, because the mean of its divisors is an integer number (17598054600).

Almost surely, 2^399228557585 is an apocalyptic number.

It is an amenable number.

399228557585 is a deficient number, since it is larger than the sum of its proper divisors (163909189615).

399228557585 is a wasteful number, since it uses less digits than its factorization.

399228557585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306809.

The product of its digits is 272160000, while the sum is 68.

The spelling of 399228557585 in words is "three hundred ninety-nine billion, two hundred twenty-eight million, five hundred fifty-seven thousand, five hundred eighty-five".