399341922 has 16 divisors (see below), whose sum is σ = 912781632. Its totient is φ = 114097680.

The previous prime is 399341863. The next prime is 399341941. The reversal of 399341922 is 229143993.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 9508141 = 399341922 / (3 + 9 + 9 + 3 + 4 + 1 + 9 + 2 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4754029 + ... + 4754112.

It is an arithmetic number, because the mean of its divisors is an integer number (57048852).

Almost surely, 2^399341922 is an apocalyptic number.

399341922 is an abundant number, since it is smaller than the sum of its proper divisors (513439710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399341922 is a wasteful number, since it uses less digits than its factorization.

399341922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9508153.

The product of its digits is 104976, while the sum is 42.

The square root of 399341922 is about 19983.5412777616. The cubic root of 399341922 is about 736.4020145909.

The spelling of 399341922 in words is "three hundred ninety-nine million, three hundred forty-one thousand, nine hundred twenty-two".