25440528 has 40 divisors (see below), whose sum is σ = 66563200. Its totient is φ = 8371584.

The previous prime is 25440521. The next prime is 25440529. The reversal of 25440528 is 82504452.

It is a junction number, because it is equal to n+sod(n) for n = 25440495 and 25440504.

It is not an unprimeable number, because it can be changed into a prime (25440521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438 + ... + 7146.

It is an arithmetic number, because the mean of its divisors is an integer number (1664080).

Almost surely, 2^25440528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25440528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33281600).

25440528 is an abundant number, since it is smaller than the sum of its proper divisors (41122672).

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

25440528 is a wasteful number, since it uses less digits than its factorization.

25440528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6799 (or 6793 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 25440528 is about 5043.8604263005. The cubic root of 25440528 is about 294.1092656937.

The spelling of 25440528 in words is "twenty-five million, four hundred forty thousand, five hundred twenty-eight".