28257582531250 has 28 divisors (see below), whose sum is σ = 52982289122706. Its totient is φ = 11303033000000.

The previous prime is 28257582531181. The next prime is 28257582531293. The reversal of 28257582531250 is 5213528575282.

It can be written as a sum of positive squares in 7 ways, for example, as 17917196902641 + 10340385628609 = 4232871^2 + 3215647^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28257582531191 and 28257582531200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 452090071 + ... + 452152570.

Almost surely, 2^{28257582531250} is an apocalyptic number.

28257582531250 is a deficient number, since it is larger than the sum of its proper divisors (24724706591456).

28257582531250 is an frugal number, since it uses more digits than its factorization.

28257582531250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904242673 (or 904242648 counting only the distinct ones).

The product of its (nonzero) digits is 13440000, while the sum is 55.

The spelling of 28257582531250 in words is "twenty-eight trillion, two hundred fifty-seven billion, five hundred eighty-two million, five hundred thirty-one thousand, two hundred fifty".