399346934 has 32 divisors (see below), whose sum is σ = 711042816. Its totient is φ = 164656800.

The previous prime is 399346877. The next prime is 399346939. The reversal of 399346934 is 439643993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399346939) 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, 35384 + ... + 45284.

It is an arithmetic number, because the mean of its divisors is an integer number (22220088).

Almost surely, 2^399346934 is an apocalyptic number.

399346934 is a deficient number, since it is larger than the sum of its proper divisors (311695882).

399346934 is a wasteful number, since it uses less digits than its factorization.

399346934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10020.

The product of its digits is 1889568, while the sum is 50.

The square root of 399346934 is about 19983.6666805669. Note that the first 4 decimals coincide. The cubic root of 399346934 is about 736.4050953522.

The spelling of 399346934 in words is "three hundred ninety-nine million, three hundred forty-six thousand, nine hundred thirty-four".