25865244 has 60 divisors (see below), whose sum is σ = 68396944. Its totient is φ = 8522496.

The previous prime is 25865209. The next prime is 25865263. The reversal of 25865244 is 44256852.

It is a happy number.

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 = 25865199 and 25865208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31017 + ... + 31839.

Almost surely, 2^25865244 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 25865244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34198472).

25865244 is an abundant number, since it is smaller than the sum of its proper divisors (42531700).

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

25865244 is a wasteful number, since it uses less digits than its factorization.

25865244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936 (or 925 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 25865244 is about 5085.7884344514. The cubic root of 25865244 is about 295.7369070822.

The spelling of 25865244 in words is "twenty-five million, eight hundred sixty-five thousand, two hundred forty-four".