25543872 has 84 divisors (see below), whose sum is σ = 74519536. Its totient is φ = 8363520.

The previous prime is 25543853. The next prime is 25543879. The reversal of 25543872 is 27834552.

25543872 is a `hidden beast` number, since 2 + 554 + 38 + 72 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (25543879) 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, 34773 + ... + 35499.

Almost surely, 2^25543872 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 25543872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37259768).

25543872 is an abundant number, since it is smaller than the sum of its proper divisors (48975664).

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

25543872 is a wasteful number, since it uses less digits than its factorization.

25543872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 793 counting only the distinct ones).

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

The square root of 25543872 is about 5054.0945776667. The cubic root of 25543872 is about 294.5069692412.

The spelling of 25543872 in words is "twenty-five million, five hundred forty-three thousand, eight hundred seventy-two".