399044 has 6 divisors (see below), whose sum is σ = 698334. Its totient is φ = 199520.

The previous prime is 399043. The next prime is 399059. The reversal of 399044 is 440993.

It is a happy number.

399044 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 262144 + 136900 = 512^2 + 370^2 .

It is a super-2 number, since 2×399044² = 318472227872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398998 and 399016.

It is not an unprimeable number, because it can be changed into a prime (399043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49877 + ... + 49884.

It is an arithmetic number, because the mean of its divisors is an integer number (116389).

2³⁹⁹⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

399044 is a deficient number, since it is larger than the sum of its proper divisors (299290).

399044 is a wasteful number, since it uses less digits than its factorization.

399044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99765 (or 99763 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 399044 is about 631.6992955513. The cubic root of 399044 is about 73.6218842453.

The spelling of 399044 in words is "three hundred ninety-nine thousand, forty-four".