28400068688 has 40 divisors (see below), whose sum is σ = 58335313920. Its totient is φ = 13370555520.

The previous prime is 28400068681. The next prime is 28400068691. The reversal of 28400068688 is 88686000482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28400068681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755408 + ... + 792111.

It is an arithmetic number, because the mean of its divisors is an integer number (1458382848).

Almost surely, 2^28400068688 is an apocalyptic number.

It is an amenable number.

28400068688 is an abundant number, since it is smaller than the sum of its proper divisors (29935245232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28400068688 is a wasteful number, since it uses less digits than its factorization.

28400068688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547595 (or 1547589 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 50.

The spelling of 28400068688 in words is "twenty-eight billion, four hundred million, sixty-eight thousand, six hundred eighty-eight".