399411788 has 24 divisors (see below), whose sum is σ = 704450208. Its totient is φ = 198147456.

The previous prime is 399411773. The next prime is 399411799. The reversal of 399411788 is 887114993.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328670 + ... + 329882.

It is an arithmetic number, because the mean of its divisors is an integer number (29352092).

Almost surely, 2^399411788 is an apocalyptic number.

It is an amenable number.

399411788 is a deficient number, since it is larger than the sum of its proper divisors (305038420).

399411788 is a wasteful number, since it uses less digits than its factorization.

399411788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793 (or 1791 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 399411788 is about 19985.2892898752. The cubic root of 399411788 is about 736.4449572925. Note that the first 3 decimals are identical.

The spelling of 399411788 in words is "three hundred ninety-nine million, four hundred eleven thousand, seven hundred eighty-eight".