25506944 has 32 divisors (see below), whose sum is σ = 51343740. Its totient is φ = 12620800.

The previous prime is 25506937. The next prime is 25506973. The reversal of 25506944 is 44960552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25000000 + 506944 = 5000^2 + 712^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11942 + ... + 13914.

Almost surely, 2^25506944 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 25506944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25671870).

25506944 is an abundant number, since it is smaller than the sum of its proper divisors (25836796).

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

25506944 is a wasteful number, since it uses less digits than its factorization.

25506944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 25506944 is about 5050.4399808334. The cubic root of 25506944 is about 294.3649808693.

It can be divided in two parts, 25 and 506944, that multiplied together give a square (12673600 = 3560²).

The spelling of 25506944 in words is "twenty-five million, five hundred six thousand, nine hundred forty-four".