25864944 has 80 divisors (see below), whose sum is σ = 77971200. Its totient is φ = 7385280.

The previous prime is 25864933. The next prime is 25864957. The reversal of 25864944 is 44946852.

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

It is a junction number, because it is equal to n+sod(n) for n = 25864896 and 25864905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15679 + ... + 17249.

It is an arithmetic number, because the mean of its divisors is an integer number (974640).

Almost surely, 2^25864944 is an apocalyptic number.

25864944 is a gapful number since it is divisible by the number (24) 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 25864944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38985600).

25864944 is an abundant number, since it is smaller than the sum of its proper divisors (52106256).

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

25864944 is a wasteful number, since it uses less digits than its factorization.

25864944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603 (or 1583 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 25864944 is about 5085.7589404139. The cubic root of 25864944 is about 295.7357637021.

The spelling of 25864944 in words is "twenty-five million, eight hundred sixty-four thousand, nine hundred forty-four".