28125898136 has 32 divisors (see below), whose sum is σ = 60653684640. Its totient is φ = 11977175808.

The previous prime is 28125898069. The next prime is 28125898187. The reversal of 28125898136 is 63189852182.

It is a super-2 number, since 2×28125898136² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1590725 + ... + 1608308.

It is an arithmetic number, because the mean of its divisors is an integer number (1895427645).

Almost surely, 2^28125898136 is an apocalyptic number.

It is an amenable number.

28125898136 is an abundant number, since it is smaller than the sum of its proper divisors (32527786504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28125898136 is a wasteful number, since it uses less digits than its factorization.

28125898136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199203 (or 3199199 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 53.

The spelling of 28125898136 in words is "twenty-eight billion, one hundred twenty-five million, eight hundred ninety-eight thousand, one hundred thirty-six".