28469583280 has 160 divisors (see below), whose sum is σ = 72554731200. Its totient is φ = 10351411200.

The previous prime is 28469583271. The next prime is 28469583281. The reversal of 28469583280 is 8238596482.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28469583281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3797776 + ... + 3805264.

It is an arithmetic number, because the mean of its divisors is an integer number (453467070).

Almost surely, 2^28469583280 is an apocalyptic number.

28469583280 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 28469583280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36277365600).

28469583280 is an abundant number, since it is smaller than the sum of its proper divisors (44085147920).

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

28469583280 is a wasteful number, since it uses less digits than its factorization.

28469583280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7623 (or 7617 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 28469583280 in words is "twenty-eight billion, four hundred sixty-nine million, five hundred eighty-three thousand, two hundred eighty".