25436138 has 16 divisors (see below), whose sum is σ = 46959360. Its totient is φ = 10062576.

The previous prime is 25436093. The next prime is 25436189. The reversal of 25436138 is 83163452.

It is an unprimeable number.

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, 69698 + ... + 70061.

It is an arithmetic number, because the mean of its divisors is an integer number (2934960).

Almost surely, 2^25436138 is an apocalyptic number.

25436138 is a deficient number, since it is larger than the sum of its proper divisors (21523222).

25436138 is a wasteful number, since it uses less digits than its factorization.

25436138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139781.

The product of its digits is 17280, while the sum is 32.

The square root of 25436138 is about 5043.4252249835. The cubic root of 25436138 is about 294.0923476231.

The spelling of 25436138 in words is "twenty-five million, four hundred thirty-six thousand, one hundred thirty-eight".