25568740 has 12 divisors (see below), whose sum is σ = 53694396. Its totient is φ = 10227488.

The previous prime is 25568729. The next prime is 25568743. The reversal of 25568740 is 4786552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10653696 + 14915044 = 3264^2 + 3862^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25568740.

It is not an unprimeable number, because it can be changed into a prime (25568743) 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 3 ways as a sum of consecutive naturals, for example, 639199 + ... + 639238.

It is an arithmetic number, because the mean of its divisors is an integer number (4474533).

Almost surely, 2^25568740 is an apocalyptic number.

25568740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25568740 is an abundant number, since it is smaller than the sum of its proper divisors (28125656).

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

25568740 is a wasteful number, since it uses less digits than its factorization.

25568740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278446 (or 1278444 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 25568740 is about 5056.5541626685. The cubic root of 25568740 is about 294.6025097544.

The spelling of 25568740 in words is "twenty-five million, five hundred sixty-eight thousand, seven hundred forty".