25638258 has 16 divisors (see below), whose sum is σ = 53975520. Its totient is φ = 8096256.

The previous prime is 25638251. The next prime is 25638259. The reversal of 25638258 is 85283652.

It is not an unprimeable number, because it can be changed into a prime (25638251) 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 7 ways as a sum of consecutive naturals, for example, 112335 + ... + 112562.

It is an arithmetic number, because the mean of its divisors is an integer number (3373470).

Almost surely, 2^25638258 is an apocalyptic number.

25638258 is an abundant number, since it is smaller than the sum of its proper divisors (28337262).

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

25638258 is a wasteful number, since it uses less digits than its factorization.

25638258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224921.

The product of its digits is 115200, while the sum is 39.

The square root of 25638258 is about 5063.4235453890. The cubic root of 25638258 is about 294.8692631455.

The spelling of 25638258 in words is "twenty-five million, six hundred thirty-eight thousand, two hundred fifty-eight".