28474922280 has 512 divisors, whose sum is σ = 107790336000. Its totient is φ = 5871191040.

The previous prime is 28474922279. The next prime is 28474922321. The reversal of 28474922280 is 8222947482.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33148491 + ... + 33149349.

It is an arithmetic number, because the mean of its divisors is an integer number (210528000).

Almost surely, 2^28474922280 is an apocalyptic number.

28474922280 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 28474922280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53895168000).

28474922280 is an abundant number, since it is smaller than the sum of its proper divisors (79315413720).

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

28474922280 is a wasteful number, since it uses less digits than its factorization.

28474922280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 28474922280 in words is "twenty-eight billion, four hundred seventy-four million, nine hundred twenty-two thousand, two hundred eighty".