25797128 has 24 divisors (see below), whose sum is σ = 56267550. Its totient is φ = 11055744.

The previous prime is 25797127. The next prime is 25797131. The reversal of 25797128 is 82179752.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 10099684 = 3962^2 + 3178^2 .

It is a super-3 number, since 3×25797128³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25797127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32513 + ... + 33296.

Almost surely, 2^25797128 is an apocalyptic number.

25797128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25797128 is an abundant number, since it is smaller than the sum of its proper divisors (30470422).

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

25797128 is a wasteful number, since it uses less digits than its factorization.

25797128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65829 (or 65818 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 25797128 is about 5079.0873195880. The cubic root of 25797128 is about 295.4770715993.

The spelling of 25797128 in words is "twenty-five million, seven hundred ninety-seven thousand, one hundred twenty-eight".