25228544 has 108 divisors (see below), whose sum is σ = 60240768. Its totient is φ = 10444800.

The previous prime is 25228543. The next prime is 25228559. The reversal of 25228544 is 44582252.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 25228544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25228543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 813809 + ... + 813839.

Almost surely, 2^25228544 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 25228544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30120384).

25228544 is an abundant number, since it is smaller than the sum of its proper divisors (35012224).

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

25228544 is a wasteful number, since it uses less digits than its factorization.

25228544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 61 counting only the distinct ones).

The product of its digits is 25600, while the sum is 32.

The square root of 25228544 is about 5022.8024050325. The cubic root of 25228544 is about 293.2900946368.

The spelling of 25228544 in words is "twenty-five million, two hundred twenty-eight thousand, five hundred forty-four".