28626445884 has 24 divisors (see below), whose sum is σ = 66800968528. Its totient is φ = 9541301760.

The previous prime is 28626445831. The next prime is 28626445891. The reversal of 28626445884 is 48854462682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43404 + ... + 243180.

Almost surely, 2^28626445884 is an apocalyptic number.

It is an amenable number.

28626445884 is an abundant number, since it is smaller than the sum of its proper divisors (38174522644).

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

28626445884 is a wasteful number, since it uses less digits than its factorization.

28626445884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211725 (or 211723 counting only the distinct ones).

The product of its digits is 23592960, while the sum is 57.

The spelling of 28626445884 in words is "twenty-eight billion, six hundred twenty-six million, four hundred forty-five thousand, eight hundred eighty-four".