28815554868 has 48 divisors (see below), whose sum is σ = 69624436224. Its totient is φ = 9265979520.

The previous prime is 28815554843. The next prime is 28815554893. The reversal of 28815554868 is 86845551882.

It is an interprime number because it is at equal distance from previous prime (28815554843) and next prime (28815554893).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4255 + ... + 240102.

It is an arithmetic number, because the mean of its divisors is an integer number (1450509088).

Almost surely, 2^28815554868 is an apocalyptic number.

It is an amenable number.

28815554868 is an abundant number, since it is smaller than the sum of its proper divisors (40808881356).

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

28815554868 is a wasteful number, since it uses less digits than its factorization.

28815554868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244712 (or 244710 counting only the distinct ones).

The product of its digits is 24576000, while the sum is 60.

The spelling of 28815554868 in words is "twenty-eight billion, eight hundred fifteen million, five hundred fifty-four thousand, eight hundred sixty-eight".