28089200556 has 18 divisors (see below), whose sum is σ = 71003257052. Its totient is φ = 9363066840.

The previous prime is 28089200519. The next prime is 28089200561. The reversal of 28089200556 is 65500298082.

28089200556 is a `hidden beast` number, since 2 + 8 + 0 + 8 + 92 + 0 + 0 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390127750 + ... + 390127821.

Almost surely, 2^28089200556 is an apocalyptic number.

It is an amenable number.

28089200556 is an abundant number, since it is smaller than the sum of its proper divisors (42914056496).

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

28089200556 is a wasteful number, since it uses less digits than its factorization.

28089200556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780255581 (or 780255576 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 28089200556 in words is "twenty-eight billion, eighty-nine million, two hundred thousand, five hundred fifty-six".