25865730 has 80 divisors (see below), whose sum is σ = 75898944. Its totient is φ = 6268320.

The previous prime is 25865717. The next prime is 25865753. The reversal of 25865730 is 3756852.

25865730 is a `hidden beast` number, since 2 + 5 + 86 + 573 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7459 + ... + 10361.

Almost surely, 2^25865730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25865730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37949472).

25865730 is an abundant number, since it is smaller than the sum of its proper divisors (50033214).

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

25865730 is a wasteful number, since it uses less digits than its factorization.

25865730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933 (or 2924 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25865730 is about 5085.8362144292. The cubic root of 25865730 is about 295.7387593391.

The spelling of 25865730 in words is "twenty-five million, eight hundred sixty-five thousand, seven hundred thirty".