28659311115388 has 24 divisors (see below), whose sum is σ = 51777579538944. Its totient is φ = 13865822689200.

The previous prime is 28659311115377. The next prime is 28659311115433. The reversal of 28659311115388 is 88351111395682.

It is a super-2 number, since 2×28659311115388² (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, 12126958 + ... + 14296213.

It is an arithmetic number, because the mean of its divisors is an integer number (2157399147456).

Almost surely, 2^{28659311115388} is an apocalyptic number.

It is an amenable number.

28659311115388 is a deficient number, since it is larger than the sum of its proper divisors (23118268423556).

28659311115388 is a wasteful number, since it uses less digits than its factorization.

28659311115388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26431953 (or 26431951 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 61.

The spelling of 28659311115388 in words is "twenty-eight trillion, six hundred fifty-nine billion, three hundred eleven million, one hundred fifteen thousand, three hundred eighty-eight".