28457294880 has 288 divisors, whose sum is σ = 104465350080. Its totient is φ = 6492702720.

The previous prime is 28457294869. The next prime is 28457294881. The reversal of 28457294880 is 8849275482.

It is a self number, because there is not a number n which added to its sum of digits gives 28457294880.

It is not an unprimeable number, because it can be changed into a prime (28457294881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25659766 + ... + 25660874.

It is an arithmetic number, because the mean of its divisors is an integer number (362726910).

Almost surely, 2^28457294880 is an apocalyptic number.

28457294880 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 28457294880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52232675040).

28457294880 is an abundant number, since it is smaller than the sum of its proper divisors (76008055200).

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

28457294880 is a wasteful number, since it uses less digits than its factorization.

28457294880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232 (or 2217 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 57.

The spelling of 28457294880 in words is "twenty-eight billion, four hundred fifty-seven million, two hundred ninety-four thousand, eight hundred eighty".