25529472 has 128 divisors (see below), whose sum is σ = 77112000. Its totient is φ = 8312832.

The previous prime is 25529459. The next prime is 25529473. The reversal of 25529472 is 27492552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25529473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286804 + ... + 286892.

Almost surely, 2^25529472 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 25529472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38556000).

25529472 is an abundant number, since it is smaller than the sum of its proper divisors (51582528).

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

25529472 is an equidigital number, since it uses as much as digits as its factorization.

25529472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 177 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 25529472 is about 5052.6697893292. The cubic root of 25529472 is about 294.4516174459.

The spelling of 25529472 in words is "twenty-five million, five hundred twenty-nine thousand, four hundred seventy-two".