28572643580 has 96 divisors (see below), whose sum is σ = 70626608640. Its totient is φ = 9608970240.

The previous prime is 28572643579. The next prime is 28572643609. The reversal of 28572643580 is 8534627582.

It is a super-2 number, since 2×28572643580² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32756 + ... + 241284.

It is an arithmetic number, because the mean of its divisors is an integer number (735693840).

Almost surely, 2^28572643580 is an apocalyptic number.

28572643580 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 28572643580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35313304320).

28572643580 is an abundant number, since it is smaller than the sum of its proper divisors (42053965060).

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

28572643580 is a wasteful number, since it uses less digits than its factorization.

28572643580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208599 (or 208597 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 28572643580 in words is "twenty-eight billion, five hundred seventy-two million, six hundred forty-three thousand, five hundred eighty".