28025773280 has 48 divisors (see below), whose sum is σ = 66221172864. Its totient is φ = 11208568320.

The previous prime is 28025773261. The next prime is 28025773289. The reversal of 28025773280 is 8237752082.

It is a Cunningham number, because it is equal to 167409²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025773289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1665710 + ... + 1682450.

It is an arithmetic number, because the mean of its divisors is an integer number (1379607768).

Almost surely, 2^28025773280 is an apocalyptic number.

28025773280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28025773280 is an abundant number, since it is smaller than the sum of its proper divisors (38195399584).

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

28025773280 is a wasteful number, since it uses less digits than its factorization.

28025773280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27219 (or 27211 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 28025773280 in words is "twenty-eight billion, twenty-five million, seven hundred seventy-three thousand, two hundred eighty".