399438476 has 6 divisors (see below), whose sum is σ = 699017340. Its totient is φ = 199719236.

The previous prime is 399438469. The next prime is 399438499. The reversal of 399438476 is 674834993.

It is a super-2 number, since 2×399438476² = 319102192218405152, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49929806 + ... + 49929813.

It is an arithmetic number, because the mean of its divisors is an integer number (116502890).

Almost surely, 2^399438476 is an apocalyptic number.

It is an amenable number.

399438476 is a deficient number, since it is larger than the sum of its proper divisors (299578864).

399438476 is a wasteful number, since it uses less digits than its factorization.

399438476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99859623 (or 99859621 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 53.

The square root of 399438476 is about 19985.9569698326. The cubic root of 399438476 is about 736.4613595837.

The spelling of 399438476 in words is "three hundred ninety-nine million, four hundred thirty-eight thousand, four hundred seventy-six".