399728396 has 12 divisors (see below), whose sum is σ = 699828360. Its totient is φ = 199777440.

The previous prime is 399728383. The next prime is 399728411. The reversal of 399728396 is 693827993.

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 in 3 ways as a sum of consecutive naturals, for example, 10706 + ... + 30233.

It is an arithmetic number, because the mean of its divisors is an integer number (58319030).

Almost surely, 2^399728396 is an apocalyptic number.

It is an amenable number.

399728396 is a deficient number, since it is larger than the sum of its proper divisors (300099964).

399728396 is a wasteful number, since it uses less digits than its factorization.

399728396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43384 (or 43382 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 56.

The square root of 399728396 is about 19993.2087469721. The cubic root of 399728396 is about 736.6394956866.

The spelling of 399728396 in words is "three hundred ninety-nine million, seven hundred twenty-eight thousand, three hundred ninety-six".