25289472 has 144 divisors (see below), whose sum is σ = 77263200. Its totient is φ = 7274496.

The previous prime is 25289377. The next prime is 25289477. The reversal of 25289472 is 27498252.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 25289472.

It is not an unprimeable number, because it can be changed into a prime (25289477) 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, 169654 + ... + 169802.

It is an arithmetic number, because the mean of its divisors is an integer number (536550).

Almost surely, 2^25289472 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 25289472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38631600).

25289472 is an abundant number, since it is smaller than the sum of its proper divisors (51973728).

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

25289472 is a wasteful number, since it uses less digits than its factorization.

25289472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 184 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 25289472 is about 5028.8638875993. The cubic root of 25289472 is about 293.5260074834.

The spelling of 25289472 in words is "twenty-five million, two hundred eighty-nine thousand, four hundred seventy-two".