25723136 has 36 divisors (see below), whose sum is σ = 51968700. Its totient is φ = 12705792.

The previous prime is 25723133. The next prime is 25723141. The reversal of 25723136 is 63132752.

It can be written as a sum of positive squares in 2 ways, for example, as 3444736 + 22278400 = 1856^2 + 4720^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25723099 and 25723108.

It is not an unprimeable number, because it can be changed into a prime (25723133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22220 + ... + 23348.

It is an arithmetic number, because the mean of its divisors is an integer number (1443575).

Almost surely, 2^25723136 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 25723136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25984350).

25723136 is an abundant number, since it is smaller than the sum of its proper divisors (26245564).

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

25723136 is an equidigital number, since it uses as much as digits as its factorization.

25723136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1220 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 25723136 is about 5071.7981032372. The cubic root of 25723136 is about 295.1943027129.

Adding to 25723136 its reverse (63132752), we get a palindrome (88855888).

The spelling of 25723136 in words is "twenty-five million, seven hundred twenty-three thousand, one hundred thirty-six".