28255057680 has 80 divisors (see below), whose sum is σ = 89454345984. Its totient is φ = 7374366720.

The previous prime is 28255057679. The next prime is 28255057703. The reversal of 28255057680 is 8675055282.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 1241161 + ... + 1263720.

Almost surely, 2^28255057680 is an apocalyptic number.

28255057680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28255057680 is an abundant number, since it is smaller than the sum of its proper divisors (61199288304).

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

28255057680 is a wasteful number, since it uses less digits than its factorization.

28255057680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504944 (or 2504938 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 48.

The spelling of 28255057680 in words is "twenty-eight billion, two hundred fifty-five million, fifty-seven thousand, six hundred eighty".