399455468 has 12 divisors (see below), whose sum is σ = 735839160. Its totient is φ = 189215712.

The previous prime is 399455447. The next prime is 399455471. The reversal of 399455468 is 864554993.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2627921 + ... + 2628072.

It is an arithmetic number, because the mean of its divisors is an integer number (61319930).

Almost surely, 2^399455468 is an apocalyptic number.

399455468 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

399455468 is a deficient number, since it is larger than the sum of its proper divisors (336383692).

399455468 is a wasteful number, since it uses less digits than its factorization.

399455468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256016 (or 5256014 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 53.

The square root of 399455468 is about 19986.3820637953. The cubic root of 399455468 is about 736.4718023884.

The spelling of 399455468 in words is "three hundred ninety-nine million, four hundred fifty-five thousand, four hundred sixty-eight".