28402837688 has 16 divisors (see below), whose sum is σ = 53261271360. Its totient is φ = 14199832000.

The previous prime is 28402837681. The next prime is 28402837721. The reversal of 28402837688 is 88673820482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28402837681) 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, 120488 + ... + 267063.

It is an arithmetic number, because the mean of its divisors is an integer number (3328829460).

Almost surely, 2^28402837688 is an apocalyptic number.

It is an amenable number.

28402837688 is a deficient number, since it is larger than the sum of its proper divisors (24858433672).

28402837688 is a wasteful number, since it uses less digits than its factorization.

28402837688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396718 (or 396714 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 56.

The spelling of 28402837688 in words is "twenty-eight billion, four hundred two million, eight hundred thirty-seven thousand, six hundred eighty-eight".