28575722240 has 144 divisors (see below), whose sum is σ = 75429143328. Its totient is φ = 10305404928.

The previous prime is 28575722191. The next prime is 28575722251. The reversal of 28575722240 is 4222757582.

It is a junction number, because it is equal to n+sod(n) for n = 28575722191 and 28575722200.

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, 695552 + ... + 735488.

Almost surely, 2^28575722240 is an apocalyptic number.

28575722240 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 28575722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37714571664).

28575722240 is an abundant number, since it is smaller than the sum of its proper divisors (46853421088).

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

28575722240 is a wasteful number, since it uses less digits than its factorization.

28575722240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40014 (or 40000 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 44.

The spelling of 28575722240 in words is "twenty-eight billion, five hundred seventy-five million, seven hundred twenty-two thousand, two hundred forty".