399431246 has 8 divisors (see below), whose sum is σ = 599337144. Its totient is φ = 199652200.

The previous prime is 399431213. The next prime is 399431251. The reversal of 399431246 is 642134993.

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

It is a super-2 number, since 2×399431246² = 319090640562225032, which contains 22 as substring.

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, 23405 + ... + 36696.

It is an arithmetic number, because the mean of its divisors is an integer number (74917143).

Almost surely, 2^399431246 is an apocalyptic number.

399431246 is a deficient number, since it is larger than the sum of its proper divisors (199905898).

399431246 is a wasteful number, since it uses less digits than its factorization.

399431246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63426.

The product of its digits is 139968, while the sum is 41.

The square root of 399431246 is about 19985.7760920110. The cubic root of 399431246 is about 736.4569161395.

The spelling of 399431246 in words is "three hundred ninety-nine million, four hundred thirty-one thousand, two hundred forty-six".