25453728 has 72 divisors (see below), whose sum is σ = 74745216. Its totient is φ = 8208000.

The previous prime is 25453723. The next prime is 25453741. The reversal of 25453728 is 82735452.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 25453692 and 25453701.

It is not an unprimeable number, because it can be changed into a prime (25453723) 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, 7503 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (1038128).

Almost surely, 2^25453728 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 25453728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37372608).

25453728 is an abundant number, since it is smaller than the sum of its proper divisors (49291488).

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

25453728 is a wasteful number, since it uses less digits than its factorization.

25453728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2887 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 25453728 is about 5045.1687781481. The cubic root of 25453728 is about 294.1601237977.

The spelling of 25453728 in words is "twenty-five million, four hundred fifty-three thousand, seven hundred twenty-eight".