399470942 has 8 divisors (see below), whose sum is σ = 645299256. Its totient is φ = 184371192.

The previous prime is 399470909. The next prime is 399470959. The reversal of 399470942 is 249074993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7682108 + ... + 7682159.

It is an arithmetic number, because the mean of its divisors is an integer number (80662407).

Almost surely, 2^399470942 is an apocalyptic number.

399470942 is a deficient number, since it is larger than the sum of its proper divisors (245828314).

399470942 is a wasteful number, since it uses less digits than its factorization.

399470942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15364282.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 399470942 is about 19986.7691736308. The cubic root of 399470942 is about 736.4813120154.

The spelling of 399470942 in words is "three hundred ninety-nine million, four hundred seventy thousand, nine hundred forty-two".