28402640288 has 48 divisors (see below), whose sum is σ = 61466882400. Its totient is φ = 12811718400.

The previous prime is 28402640249. The next prime is 28402640291. The reversal of 28402640288 is 88204620482.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261863 + ... + 354086.

It is an arithmetic number, because the mean of its divisors is an integer number (1280560050).

Almost surely, 2^28402640288 is an apocalyptic number.

It is an amenable number.

28402640288 is an abundant number, since it is smaller than the sum of its proper divisors (33064242112).

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

28402640288 is a wasteful number, since it uses less digits than its factorization.

28402640288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616101 (or 616093 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 44.

The spelling of 28402640288 in words is "twenty-eight billion, four hundred two million, six hundred forty thousand, two hundred eighty-eight".