28056272520 has 64 divisors (see below), whose sum is σ = 84199875840. Its totient is φ = 7478912000.

The previous prime is 28056272509. The next prime is 28056272521. The reversal of 28056272520 is 2527265082.

It is not an unprimeable number, because it can be changed into a prime (28056272521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294385 + ... + 377855.

It is an arithmetic number, because the mean of its divisors is an integer number (1315623060).

Almost surely, 2^28056272520 is an apocalyptic number.

28056272520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28056272520 is an abundant number, since it is smaller than the sum of its proper divisors (56143603320).

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

28056272520 is a wasteful number, since it uses less digits than its factorization.

28056272520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86286 (or 86282 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The spelling of 28056272520 in words is "twenty-eight billion, fifty-six million, two hundred seventy-two thousand, five hundred twenty".