28567737825 has 24 divisors (see below), whose sum is σ = 51525812256. Its totient is φ = 13851024000.

The previous prime is 28567737769. The next prime is 28567737827. The reversal of 28567737825 is 52873776582.

It is not a de Polignac number, because 28567737825 - 2⁶ = 28567737761 is a prime.

It is a super-2 number, since 2×28567737825² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28567737827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17312956 + ... + 17314605.

It is an arithmetic number, because the mean of its divisors is an integer number (2146908844).

Almost surely, 2^28567737825 is an apocalyptic number.

28567737825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28567737825 is a deficient number, since it is larger than the sum of its proper divisors (22958074431).

28567737825 is a wasteful number, since it uses less digits than its factorization.

28567737825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34627585 (or 34627580 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 60.

The spelling of 28567737825 in words is "twenty-eight billion, five hundred sixty-seven million, seven hundred thirty-seven thousand, eight hundred twenty-five".