399967042 has 8 divisors (see below), whose sum is σ = 600653196. Its totient is φ = 199749312.

The previous prime is 399967031. The next prime is 399967063. The reversal of 399967042 is 240769993.

It can be written as a sum of positive squares in 2 ways, for example, as 260467321 + 139499721 = 16139^2 + 11811^2 .

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

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, 114963 + ... + 118390.

Almost surely, 2^399967042 is an apocalyptic number.

399967042 is a deficient number, since it is larger than the sum of its proper divisors (200686154).

399967042 is a wasteful number, since it uses less digits than its factorization.

399967042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234212.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 399967042 is about 19999.1760330270. The cubic root of 399967042 is about 736.7860627872.

The spelling of 399967042 in words is "three hundred ninety-nine million, nine hundred sixty-seven thousand, forty-two".