399901426 has 16 divisors (see below), whose sum is σ = 628450560. Its totient is φ = 190610640.

The previous prime is 399901361. The next prime is 399901433. The reversal of 399901426 is 624109993.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43981 + ... + 52288.

It is an arithmetic number, because the mean of its divisors is an integer number (39278160).

Almost surely, 2^399901426 is an apocalyptic number.

399901426 is a deficient number, since it is larger than the sum of its proper divisors (228549134).

399901426 is a wasteful number, since it uses less digits than its factorization.

399901426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96369.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 399901426 is about 19997.5354981558. The cubic root of 399901426 is about 736.7457698021.

The spelling of 399901426 in words is "three hundred ninety-nine million, nine hundred one thousand, four hundred twenty-six".