25865826 has 48 divisors (see below), whose sum is σ = 60865056. Its totient is φ = 7305984.

The previous prime is 25865773. The next prime is 25865831. The reversal of 25865826 is 62856852.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 28065 + ... + 28971.

It is an arithmetic number, because the mean of its divisors is an integer number (1268022).

Almost surely, 2^25865826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25865826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30432528).

25865826 is an abundant number, since it is smaller than the sum of its proper divisors (34999230).

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

25865826 is a wasteful number, since it uses less digits than its factorization.

25865826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1016 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 25865826 is about 5085.8456523965. The cubic root of 25865826 is about 295.7391252143.

The spelling of 25865826 in words is "twenty-five million, eight hundred sixty-five thousand, eight hundred twenty-six".