28056877525 has 12 divisors (see below), whose sum is σ = 34793093412. Its totient is φ = 22443847040.

The previous prime is 28056877501. The next prime is 28056877531. The reversal of 28056877525 is 52577865082.

It can be written as a sum of positive squares in 6 ways, for example, as 1493745201 + 26563132324 = 38649^2 + 162982^2 .

It is not a de Polignac number, because 28056877525 - 2¹³ = 28056869333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394497 + ... + 460153.

It is an arithmetic number, because the mean of its divisors is an integer number (2899424451).

Almost surely, 2^28056877525 is an apocalyptic number.

28056877525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28056877525 is a deficient number, since it is larger than the sum of its proper divisors (6736215887).

28056877525 is a wasteful number, since it uses less digits than its factorization.

28056877525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82760 (or 82755 counting only the distinct ones).

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 28056877525 in words is "twenty-eight billion, fifty-six million, eight hundred seventy-seven thousand, five hundred twenty-five".