399865342 has 32 divisors (see below), whose sum is σ = 639074304. Its totient is φ = 187336800.

The previous prime is 399865307. The next prime is 399865357. The reversal of 399865342 is 243568993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337992 + ... + 339172.

It is an arithmetic number, because the mean of its divisors is an integer number (19971072).

Almost surely, 2^399865342 is an apocalyptic number.

399865342 is a deficient number, since it is larger than the sum of its proper divisors (239208962).

399865342 is a wasteful number, since it uses less digits than its factorization.

399865342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its digits is 1399680, while the sum is 49.

The square root of 399865342 is about 19996.6332666277. The cubic root of 399865342 is about 736.7236097294.

The spelling of 399865342 in words is "three hundred ninety-nine million, eight hundred sixty-five thousand, three hundred forty-two".