25743240 has 96 divisors (see below), whose sum is σ = 85662720. Its totient is φ = 6701184.

The previous prime is 25743239. The next prime is 25743247. The reversal of 25743240 is 4234752.

It is not an unprimeable number, because it can be changed into a prime (25743247) 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 23 ways as a sum of consecutive naturals, for example, 14649 + ... + 16311.

It is an arithmetic number, because the mean of its divisors is an integer number (892320).

Almost surely, 2^25743240 is an apocalyptic number.

25743240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25743240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42831360).

25743240 is an abundant number, since it is smaller than the sum of its proper divisors (59919480).

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

25743240 is a wasteful number, since it uses less digits than its factorization.

25743240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 25743240 is about 5073.7796562326. The cubic root of 25743240 is about 295.2711860404.

Adding to 25743240 its reverse (4234752), we get a palindrome (29977992).

The spelling of 25743240 in words is "twenty-five million, seven hundred forty-three thousand, two hundred forty".