399016 has 8 divisors (see below), whose sum is σ = 748170. Its totient is φ = 199504.

The previous prime is 398989. The next prime is 399023. The reversal of 399016 is 610993.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 2116 = 630^2 + 46^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24931 + ... + 24946.

2³⁹⁹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

399016 is a deficient number, since it is larger than the sum of its proper divisors (349154).

399016 is a wasteful number, since it uses less digits than its factorization.

399016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49883 (or 49879 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 399016 is about 631.6771327189. The cubic root of 399016 is about 73.6201622456.

The spelling of 399016 in words is "three hundred ninety-nine thousand, sixteen".