25570240 has 28 divisors (see below), whose sum is σ = 60889896. Its totient is φ = 10227968.

The previous prime is 25570231. The next prime is 25570241. The reversal of 25570240 is 4207552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25570241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39634 + ... + 40273.

Almost surely, 2^25570240 is an apocalyptic number.

25570240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25570240 is an abundant number, since it is smaller than the sum of its proper divisors (35319656).

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

25570240 is an equidigital number, since it uses as much as digits as its factorization.

25570240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79924 (or 79914 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 25570240 is about 5056.7024828439. The cubic root of 25570240 is about 294.6082706317.

Adding to 25570240 its reverse (4207552), we get a palindrome (29777792).

The spelling of 25570240 in words is "twenty-five million, five hundred seventy thousand, two hundred forty".