28500646980 has 48 divisors (see below), whose sum is σ = 85940414784. Its totient is φ = 7015543680.

The previous prime is 28500646927. The next prime is 28500647003. The reversal of 28500646980 is 8964600582.

It is a happy 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, 18268866 + ... + 18270425.

It is an arithmetic number, because the mean of its divisors is an integer number (1790425308).

Almost surely, 2^28500646980 is an apocalyptic number.

28500646980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28500646980 is an abundant number, since it is smaller than the sum of its proper divisors (57439767804).

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

28500646980 is a wasteful number, since it uses less digits than its factorization.

28500646980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36539316 (or 36539314 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 28500646980 in words is "twenty-eight billion, five hundred million, six hundred forty-six thousand, nine hundred eighty".