25568638 has 8 divisors (see below), whose sum is σ = 38981880. Its totient is φ = 12574680.

The previous prime is 25568567. The next prime is 25568639. The reversal of 25568638 is 83686552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25568594 and 25568603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25568639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104668 + ... + 104911.

It is an arithmetic number, because the mean of its divisors is an integer number (4872735).

Almost surely, 2^25568638 is an apocalyptic number.

25568638 is a deficient number, since it is larger than the sum of its proper divisors (13413242).

25568638 is a wasteful number, since it uses less digits than its factorization.

25568638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209642.

The product of its digits is 345600, while the sum is 43.

The square root of 25568638 is about 5056.5440767386. The cubic root of 25568638 is about 294.6021180066.

The spelling of 25568638 in words is "twenty-five million, five hundred sixty-eight thousand, six hundred thirty-eight".