31728873288886 has 16 divisors (see below), whose sum is σ = 48076172807040. Its totient is φ = 15703558444800.

The previous prime is 31728873288859. The next prime is 31728873288943. The reversal of 31728873288886 is 68888237882713.

It is a super-2 number, since 2×31728873288886² (a number of 28 digits) 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 7 ways as a sum of consecutive naturals, for example, 18186726 + ... + 19854841.

It is an arithmetic number, because the mean of its divisors is an integer number (3004760800440).

Almost surely, 2^{31728873288886} is an apocalyptic number.

31728873288886 is a deficient number, since it is larger than the sum of its proper divisors (16347299518154).

31728873288886 is a wasteful number, since it uses less digits than its factorization.

31728873288886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38045799.

The product of its digits is 2774532096, while the sum is 79.

The spelling of 31728873288886 in words is "thirty-one trillion, seven hundred twenty-eight billion, eight hundred seventy-three million, two hundred eighty-eight thousand, eight hundred eighty-six".