25447572 has 72 divisors (see below), whose sum is σ = 69765696. Its totient is φ = 7789824.

The previous prime is 25447547. The next prime is 25447649. The reversal of 25447572 is 27574452.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25833 + ... + 26799.

It is an arithmetic number, because the mean of its divisors is an integer number (968968).

Almost surely, 2^25447572 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 25447572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34882848).

25447572 is an abundant number, since it is smaller than the sum of its proper divisors (44318124).

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

25447572 is a wasteful number, since it uses less digits than its factorization.

25447572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1032 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 25447572 is about 5044.5586526474. The cubic root of 25447572 is about 294.1364076159.

The spelling of 25447572 in words is "twenty-five million, four hundred forty-seven thousand, five hundred seventy-two".