25538040 has 96 divisors (see below), whose sum is σ = 90558000. Its totient is φ = 6190080.

The previous prime is 25538003. The next prime is 25538059. The reversal of 25538040 is 4083552.

It is a junction number, because it is equal to n+sod(n) for n = 25537995 and 25538013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 736 + ... + 7184.

Almost surely, 2^25538040 is an apocalyptic number.

25538040 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 25538040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45279000).

25538040 is an abundant number, since it is smaller than the sum of its proper divisors (65019960).

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

25538040 is a wasteful number, since it uses less digits than its factorization.

25538040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6477 (or 6470 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 25538040 is about 5053.5175867904. The cubic root of 25538040 is about 294.4845542712.

The spelling of 25538040 in words is "twenty-five million, five hundred thirty-eight thousand, forty".