25836138 has 64 divisors (see below), whose sum is σ = 60155520. Its totient is φ = 8211456.

The previous prime is 25836137. The next prime is 25836149. The reversal of 25836138 is 83163852.

It is a super-3 number, since 3×25836138³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25836131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133770 + ... + 133962.

It is an arithmetic number, because the mean of its divisors is an integer number (939930).

Almost surely, 2^25836138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25836138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30077760).

25836138 is an abundant number, since it is smaller than the sum of its proper divisors (34319382).

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

25836138 is a wasteful number, since it uses less digits than its factorization.

25836138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 302 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 25836138 is about 5082.9261257665. The cubic root of 25836138 is about 295.6259351388.

The spelling of 25836138 in words is "twenty-five million, eight hundred thirty-six thousand, one hundred thirty-eight".