399476828 has 12 divisors (see below), whose sum is σ = 699261360. Its totient is φ = 199687872.

The previous prime is 399476813. The next prime is 399476839. The reversal of 399476828 is 828674993.

It is a happy number.

It is a super-2 number, since 2×399476828² = 319163472217883168, which contains 22 as substring.

It is a congruent number.

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, 9428 + ... + 29796.

It is an arithmetic number, because the mean of its divisors is an integer number (58271780).

Almost surely, 2^399476828 is an apocalyptic number.

It is an amenable number.

399476828 is a deficient number, since it is larger than the sum of its proper divisors (299784532).

399476828 is a wasteful number, since it uses less digits than its factorization.

399476828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25276 (or 25274 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The square root of 399476828 is about 19986.9164204987. The cubic root of 399476828 is about 736.4849292228.

The spelling of 399476828 in words is "three hundred ninety-nine million, four hundred seventy-six thousand, eight hundred twenty-eight".