399346422 has 32 divisors (see below), whose sum is σ = 856396800. Its totient is φ = 123696768.

The previous prime is 399346421. The next prime is 399346457. The reversal of 399346422 is 224643993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399346421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16722 + ... + 32837.

It is an arithmetic number, because the mean of its divisors is an integer number (26762400).

Almost surely, 2^399346422 is an apocalyptic number.

399346422 is an abundant number, since it is smaller than the sum of its proper divisors (457050378).

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

399346422 is a wasteful number, since it uses less digits than its factorization.

399346422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49660.

The product of its digits is 279936, while the sum is 42.

The square root of 399346422 is about 19983.6538701009. The cubic root of 399346422 is about 736.4047806388.

The spelling of 399346422 in words is "three hundred ninety-nine million, three hundred forty-six thousand, four hundred twenty-two".