399087722 has 16 divisors (see below), whose sum is σ = 656374752. Its totient is φ = 180480720.

The previous prime is 399087719. The next prime is 399087737. The reversal of 399087722 is 227780993.

It is a super-2 number, since 2×399087722² = 318542019702298568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41708 + ... + 50375.

It is an arithmetic number, because the mean of its divisors is an integer number (41023422).

Almost surely, 2^399087722 is an apocalyptic number.

399087722 is a deficient number, since it is larger than the sum of its proper divisors (257287030).

399087722 is a wasteful number, since it uses less digits than its factorization.

399087722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92293.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 399087722 is about 19977.1800312256. The cubic root of 399087722 is about 736.2457298676.

The spelling of 399087722 in words is "three hundred ninety-nine million, eighty-seven thousand, seven hundred twenty-two".