399446 has 16 divisors (see below), whose sum is σ = 635040. Its totient is φ = 188160.

The previous prime is 399439. The next prime is 399473. The reversal of 399446 is 644993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

399446 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4070 + ... + 4166.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2³⁹⁹⁴⁴⁶ is an apocalyptic number.

399446 is a deficient number, since it is larger than the sum of its proper divisors (235594).

399446 is a wasteful number, since it uses less digits than its factorization.

399446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199.

The product of its digits is 23328, while the sum is 35.

The square root of 399446 is about 632.0174048236. The cubic root of 399446 is about 73.6465983659.

The spelling of 399446 in words is "three hundred ninety-nine thousand, four hundred forty-six".