399538496 has 28 divisors (see below), whose sum is σ = 906097248. Its totient is φ = 171230592.

The previous prime is 399538459. The next prime is 399538523. The reversal of 399538496 is 694835993.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 445466 + ... + 446361.

It is an arithmetic number, because the mean of its divisors is an integer number (32360616).

Almost surely, 2^399538496 is an apocalyptic number.

It is an amenable number.

399538496 is an abundant number, since it is smaller than the sum of its proper divisors (506558752).

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

399538496 is an equidigital number, since it uses as much as digits as its factorization.

399538496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891846 (or 891836 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 56.

The square root of 399538496 is about 19988.4590701735. The cubic root of 399538496 is about 736.5228248006.

The spelling of 399538496 in words is "three hundred ninety-nine million, five hundred thirty-eight thousand, four hundred ninety-six".