28004267560 has 64 divisors (see below), whose sum is σ = 64446347520. Its totient is φ = 10946999040.

The previous prime is 28004267531. The next prime is 28004267609. The reversal of 28004267560 is 6576240082.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1288302 + ... + 1309858.

It is an arithmetic number, because the mean of its divisors is an integer number (1006974180).

Almost surely, 2^28004267560 is an apocalyptic number.

28004267560 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 28004267560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32223173760).

28004267560 is an abundant number, since it is smaller than the sum of its proper divisors (36442079960).

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

28004267560 is a wasteful number, since it uses less digits than its factorization.

28004267560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22306 (or 22302 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 28004267560 in words is "twenty-eight billion, four million, two hundred sixty-seven thousand, five hundred sixty".