25638342 has 8 divisors (see below), whose sum is σ = 51276696. Its totient is φ = 8546112.

The previous prime is 25638337. The next prime is 25638343. The reversal of 25638342 is 24383652.

It is a happy number.

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

25638342 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25638343) 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, 2136523 + ... + 2136534.

It is an arithmetic number, because the mean of its divisors is an integer number (6409587).

Almost surely, 2^25638342 is an apocalyptic number.

25638342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25638342 is a wasteful number, since it uses less digits than its factorization.

25638342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273062.

The product of its digits is 34560, while the sum is 33.

The square root of 25638342 is about 5063.4318401653. The cubic root of 25638342 is about 294.8695851771.

The spelling of 25638342 in words is "twenty-five million, six hundred thirty-eight thousand, three hundred forty-two".