399055942 has 8 divisors (see below), whose sum is σ = 598682232. Its totient is φ = 199495200.

The previous prime is 399055931. The next prime is 399055973. The reversal of 399055942 is 249550993.

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

It is a junction number, because it is equal to n+sod(n) for n = 399055892 and 399055901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3817 + ... + 28507.

It is an arithmetic number, because the mean of its divisors is an integer number (74835279).

Almost surely, 2^399055942 is an apocalyptic number.

399055942 is a deficient number, since it is larger than the sum of its proper divisors (199626290).

399055942 is a wasteful number, since it uses less digits than its factorization.

399055942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32774.

The product of its (nonzero) digits is 437400, while the sum is 46.

The square root of 399055942 is about 19976.3846078313. The cubic root of 399055942 is about 736.2261865366.

The spelling of 399055942 in words is "three hundred ninety-nine million, fifty-five thousand, nine hundred forty-two".