399722 has 16 divisors (see below), whose sum is σ = 644640. Its totient is φ = 185328.

The previous prime is 399719. The next prime is 399727. The reversal of 399722 is 227993.

It is not an unprimeable number, because it can be changed into a prime (399727) 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, 2468 + ... + 2624.

It is an arithmetic number, because the mean of its divisors is an integer number (40290).

2³⁹⁹⁷²² is an apocalyptic number.

399722 is a deficient number, since it is larger than the sum of its proper divisors (244918).

399722 is a wasteful number, since it uses less digits than its factorization.

399722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

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

The square root of 399722 is about 632.2357155365. The cubic root of 399722 is about 73.6635566709.

The spelling of 399722 in words is "three hundred ninety-nine thousand, seven hundred twenty-two".