28686584400788 has 12 divisors (see below), whose sum is σ = 51820926659712. Its totient is φ = 13880605355160.

The previous prime is 28686584400787. The next prime is 28686584400809. The reversal of 28686584400788 is 88700448568682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28686584400787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115671711170 + ... + 115671711417.

It is an arithmetic number, because the mean of its divisors is an integer number (4318410554976).

Almost surely, 2^{28686584400788} is an apocalyptic number.

It is an amenable number.

28686584400788 is a deficient number, since it is larger than the sum of its proper divisors (23134342258924).

28686584400788 is a wasteful number, since it uses less digits than its factorization.

28686584400788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231343422622 (or 231343422620 counting only the distinct ones).

The product of its (nonzero) digits is 1321205760, while the sum is 74.

The spelling of 28686584400788 in words is "twenty-eight trillion, six hundred eighty-six billion, five hundred eighty-four million, four hundred thousand, seven hundred eighty-eight".