399519016 has 32 divisors (see below), whose sum is σ = 841800960. Its totient is φ = 176375232.

The previous prime is 399518981. The next prime is 399519017. The reversal of 399519016 is 610915993.

It is not an unprimeable number, because it can be changed into a prime (399519017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81120 + ... + 85903.

It is an arithmetic number, because the mean of its divisors is an integer number (26306280).

Almost surely, 2^399519016 is an apocalyptic number.

It is an amenable number.

399519016 is an abundant number, since it is smaller than the sum of its proper divisors (442281944).

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

399519016 is a wasteful number, since it uses less digits than its factorization.

399519016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167065 (or 167061 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 43.

The square root of 399519016 is about 19987.9717830499. The cubic root of 399519016 is about 736.5108545750.

The spelling of 399519016 in words is "three hundred ninety-nine million, five hundred nineteen thousand, sixteen".