25713240 has 96 divisors (see below), whose sum is σ = 89754480. Its totient is φ = 5875968.

The previous prime is 25713239. The next prime is 25713271. The reversal of 25713240 is 4231752.

It is a super-2 number, since 2×25713240² = 1322341422595200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25713240.

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, 3694 + ... + 8066.

Almost surely, 2^25713240 is an apocalyptic number.

25713240 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 25713240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44877240).

25713240 is an abundant number, since it is smaller than the sum of its proper divisors (64041240).

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

25713240 is a wasteful number, since it uses less digits than its factorization.

25713240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401 (or 4390 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 25713240 is about 5070.8224185037. The cubic root of 25713240 is about 295.1564429238.

Adding to 25713240 its reverse (4231752), we get a palindrome (29944992).

The spelling of 25713240 in words is "twenty-five million, seven hundred thirteen thousand, two hundred forty".