28255466988 has 72 divisors (see below), whose sum is σ = 81642649088. Its totient is φ = 8071433568.

The previous prime is 28255466959. The next prime is 28255467029. The reversal of 28255466988 is 88966455282.

28255466988 is a `hidden beast` number, since 2 + 8 + 2 + 5 + 546 + 6 + 9 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2166495 + ... + 2179497.

Almost surely, 2^28255466988 is an apocalyptic number.

28255466988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28255466988 is an abundant number, since it is smaller than the sum of its proper divisors (53387182100).

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

28255466988 is a wasteful number, since it uses less digits than its factorization.

28255466988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21643 (or 21638 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 63.

The spelling of 28255466988 in words is "twenty-eight billion, two hundred fifty-five million, four hundred sixty-six thousand, nine hundred eighty-eight".