25644032 has 44 divisors (see below), whose sum is σ = 52075680. Its totient is φ = 12619776.

The previous prime is 25644029. The next prime is 25644043. The reversal of 25644032 is 23044652.

It is a junction number, because it is equal to n+sod(n) for n = 25643992 and 25644010.

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, 80738 + ... + 81054.

Almost surely, 2^25644032 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 25644032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26037840).

25644032 is an abundant number, since it is smaller than the sum of its proper divisors (26431648).

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

25644032 is an equidigital number, since it uses as much as digits as its factorization.

25644032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 25644032 is about 5063.9936808807. The cubic root of 25644032 is about 294.8913973499.

Adding to 25644032 its reverse (23044652), we get a palindrome (48688684).

The spelling of 25644032 in words is "twenty-five million, six hundred forty-four thousand, thirty-two".