28557234825 has 96 divisors (see below), whose sum is σ = 54845061120. Its totient is φ = 12841382400.

The previous prime is 28557234817. The next prime is 28557234847. The reversal of 28557234825 is 52843275582.

It is not a de Polignac number, because 28557234825 - 2³ = 28557234817 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30155002 + ... + 30155948.

It is an arithmetic number, because the mean of its divisors is an integer number (571302720).

Almost surely, 2^28557234825 is an apocalyptic number.

28557234825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28557234825 is a deficient number, since it is larger than the sum of its proper divisors (26287826295).

28557234825 is a wasteful number, since it uses less digits than its factorization.

28557234825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847 (or 1842 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 51.

The spelling of 28557234825 in words is "twenty-eight billion, five hundred fifty-seven million, two hundred thirty-four thousand, eight hundred twenty-five".