399145434 has 16 divisors (see below), whose sum is σ = 798911040. Its totient is φ = 132945120.

The previous prime is 399145421. The next prime is 399145441. The reversal of 399145434 is 434541993.

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, 17254 + ... + 33105.

It is an arithmetic number, because the mean of its divisors is an integer number (49931940).

Almost surely, 2^399145434 is an apocalyptic number.

399145434 is an abundant number, since it is smaller than the sum of its proper divisors (399765606).

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

399145434 is a wasteful number, since it uses less digits than its factorization.

399145434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51685.

The product of its digits is 233280, while the sum is 42.

The square root of 399145434 is about 19978.6244271221. The cubic root of 399145434 is about 736.2812176090.

The spelling of 399145434 in words is "three hundred ninety-nine million, one hundred forty-five thousand, four hundred thirty-four".