28252558287 has 12 divisors (see below), whose sum is σ = 40850195880. Its totient is φ = 18816141168.

The previous prime is 28252558283. The next prime is 28252558289. The reversal of 28252558287 is 78285525282.

28252558287 is a `hidden beast` number, since 2 + 8 + 2 + 5 + 2 + 558 + 2 + 87 = 666.

It is not a de Polignac number, because 28252558287 - 2² = 28252558283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28252558283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565337 + ... + 1583282.

It is an arithmetic number, because the mean of its divisors is an integer number (3404182990).

Almost surely, 2^28252558287 is an apocalyptic number.

28252558287 is a deficient number, since it is larger than the sum of its proper divisors (12597637593).

28252558287 is a wasteful number, since it uses less digits than its factorization.

28252558287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149622 (or 3149619 counting only the distinct ones).

The product of its digits is 7168000, while the sum is 54.

The spelling of 28252558287 in words is "twenty-eight billion, two hundred fifty-two million, five hundred fifty-eight thousand, two hundred eighty-seven".