25488540 has 192 divisors, whose sum is σ = 99025920. Its totient is φ = 5287680.

The previous prime is 25488521. The next prime is 25488581. The reversal of 25488540 is 4588452.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25488495 and 25488504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41274 + ... + 41886.

It is an arithmetic number, because the mean of its divisors is an integer number (515760).

Almost surely, 2^25488540 is an apocalyptic number.

25488540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25488540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49512960).

25488540 is an abundant number, since it is smaller than the sum of its proper divisors (73537380).

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

25488540 is a wasteful number, since it uses less digits than its factorization.

25488540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 25488540 is about 5048.6176325802. The cubic root of 25488540 is about 294.2941662107.

The spelling of 25488540 in words is "twenty-five million, four hundred eighty-eight thousand, five hundred forty".