28458764880 has 800 divisors, whose sum is σ = 115533855360. Its totient is φ = 5753180160.

The previous prime is 28458764861. The next prime is 28458764923. The reversal of 28458764880 is 8846785482.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 217242415 + ... + 217242545.

Almost surely, 2^28458764880 is an apocalyptic number.

28458764880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28458764880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57766927680).

28458764880 is an abundant number, since it is smaller than the sum of its proper divisors (87075090480).

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

28458764880 is a wasteful number, since it uses less digits than its factorization.

28458764880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 27525120, while the sum is 60.

The spelling of 28458764880 in words is "twenty-eight billion, four hundred fifty-eight million, seven hundred sixty-four thousand, eight hundred eighty".