25287444 has 192 divisors, whose sum is σ = 84295680. Its totient is φ = 6376320.

The previous prime is 25287443. The next prime is 25287463. The reversal of 25287444 is 44478252.

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

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25287399 and 25287408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25287443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 304627 + ... + 304709.

It is an arithmetic number, because the mean of its divisors is an integer number (439040).

Almost surely, 2^25287444 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 25287444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42147840).

25287444 is an abundant number, since it is smaller than the sum of its proper divisors (59008236).

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

25287444 is a wasteful number, since it uses less digits than its factorization.

25287444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 139 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 25287444 is about 5028.6622475565. The cubic root of 25287444 is about 293.5181611794.

The spelling of 25287444 in words is "twenty-five million, two hundred eighty-seven thousand, four hundred forty-four".