399268434456688 has 20 divisors (see below), whose sum is σ = 774290352627928. Its totient is φ = 199451569262400.

The previous prime is 399268434456611. The next prime is 399268434456691. The reversal of 399268434456688 is 886654434862993.

It is a super-2 number, since 2×399268434456688² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11415479838 + ... + 11415514813.

Almost surely, 2^{399268434456688} is an apocalyptic number.

It is an amenable number.

399268434456688 is a deficient number, since it is larger than the sum of its proper divisors (375021918171240).

399268434456688 is a wasteful number, since it uses less digits than its factorization.

399268434456688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830995752 (or 22830995746 counting only the distinct ones).

The product of its digits is 51597803520, while the sum is 85.

The spelling of 399268434456688 in words is "three hundred ninety-nine trillion, two hundred sixty-eight billion, four hundred thirty-four million, four hundred fifty-six thousand, six hundred eighty-eight".