25528028028 has 24 divisors (see below), whose sum is σ = 60111873360. Its totient is φ = 8431274880.

The previous prime is 25528028023. The next prime is 25528028063. The reversal of 25528028028 is 82082082552.

It is a super-3 number, since 3×25528028028³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25528028021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9757113 + ... + 9759728.

It is an arithmetic number, because the mean of its divisors is an integer number (2504661390).

Almost surely, 2^25528028028 is an apocalyptic number.

It is an amenable number.

25528028028 is an abundant number, since it is smaller than the sum of its proper divisors (34583845332).

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

25528028028 is a wasteful number, since it uses less digits than its factorization.

25528028028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19516957 (or 19516955 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 42.

The spelling of 25528028028 in words is "twenty-five billion, five hundred twenty-eight million, twenty-eight thousand, twenty-eight".