399502376 has 128 divisors (see below), whose sum is σ = 967680000. Its totient is φ = 150377472.

The previous prime is 399502351. The next prime is 399502381. The reversal of 399502376 is 673205993.

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 31 ways as a sum of consecutive naturals, for example, 2681150 + ... + 2681298.

It is an arithmetic number, because the mean of its divisors is an integer number (7560000).

Almost surely, 2^399502376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399502376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483840000).

399502376 is an abundant number, since it is smaller than the sum of its proper divisors (568177624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399502376 is a wasteful number, since it uses less digits than its factorization.

399502376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 44.

The square root of 399502376 is about 19987.5555283782. Note that the first 4 decimals coincide. The cubic root of 399502376 is about 736.5006291871.

The spelling of 399502376 in words is "three hundred ninety-nine million, five hundred two thousand, three hundred seventy-six".