399465 has 32 divisors (see below), whose sum is σ = 777600. Its totient is φ = 192960.

The previous prime is 399439. The next prime is 399473. The reversal of 399465 is 564993.

It is not a de Polignac number, because 399465 - 2⁵ = 399433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1351 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (24300).

2³⁹⁹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

399465 is a deficient number, since it is larger than the sum of its proper divisors (378135).

399465 is a wasteful number, since it uses less digits than its factorization.

399465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 288 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 399465 is about 632.0324358765. The cubic root of 399465 is about 73.6477660357.

The spelling of 399465 in words is "three hundred ninety-nine thousand, four hundred sixty-five".