399796512 has 48 divisors (see below), whose sum is σ = 1059301152. Its totient is φ = 132016640.

The previous prime is 399796489. The next prime is 399796517. The reversal of 399796512 is 215697993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×399796512² = 319674502014732288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399796517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9189 + ... + 29732.

It is an arithmetic number, because the mean of its divisors is an integer number (22068774).

Almost surely, 2^399796512 is an apocalyptic number.

399796512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399796512 is an abundant number, since it is smaller than the sum of its proper divisors (659504640).

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

399796512 is a wasteful number, since it uses less digits than its factorization.

399796512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39041 (or 39033 counting only the distinct ones).

The product of its digits is 918540, while the sum is 51.

The square root of 399796512 is about 19994.9121528453. The cubic root of 399796512 is about 736.6813358349.

The spelling of 399796512 in words is "three hundred ninety-nine million, seven hundred ninety-six thousand, five hundred twelve".