28250072660 has 24 divisors (see below), whose sum is σ = 62814868200. Its totient is φ = 10635321344.

The previous prime is 28250072657. The next prime is 28250072701. The reversal of 28250072660 is 6627005282.

It can be written as a sum of positive squares in 4 ways, for example, as 352387984 + 27897684676 = 18772^2 + 167026^2 .

It is a super-3 number, since 3×28250072660³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41543885 + ... + 41544564.

It is an arithmetic number, because the mean of its divisors is an integer number (2617286175).

Almost surely, 2^28250072660 is an apocalyptic number.

28250072660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28250072660 is an abundant number, since it is smaller than the sum of its proper divisors (34564795540).

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

28250072660 is a wasteful number, since it uses less digits than its factorization.

28250072660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83088475 (or 83088473 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 28250072660 in words is "twenty-eight billion, two hundred fifty million, seventy-two thousand, six hundred sixty".