399470 has 16 divisors (see below), whose sum is σ = 736560. Its totient is φ = 155904.

The previous prime is 399439. The next prime is 399473. The reversal of 399470 is 74993.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399470.

It is not an unprimeable number, because it can be changed into a prime (399473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35 + ... + 894.

It is an arithmetic number, because the mean of its divisors is an integer number (46035).

2³⁹⁹⁴⁷⁰ is an apocalyptic number.

399470 is a deficient number, since it is larger than the sum of its proper divisors (337090).

399470 is a wasteful number, since it uses less digits than its factorization.

399470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 399470 is about 632.0363913573. The cubic root of 399470 is about 73.6480733111.

The spelling of 399470 in words is "three hundred ninety-nine thousand, four hundred seventy".