26399136 has 48 divisors (see below), whose sum is σ = 70265664. Its totient is φ = 8676864.

The previous prime is 26399129. The next prime is 26399159. The reversal of 26399136 is 63199362.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 26399094 and 26399103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5125 + ... + 8891.

It is an arithmetic number, because the mean of its divisors is an integer number (1463868).

Almost surely, 2^26399136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26399136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35132832).

26399136 is an abundant number, since it is smaller than the sum of its proper divisors (43866528).

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

26399136 is a wasteful number, since it uses less digits than its factorization.

26399136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853 (or 3845 counting only the distinct ones).

The product of its digits is 52488, while the sum is 39.

The square root of 26399136 is about 5138.0089528922. The cubic root of 26399136 is about 297.7578622523.

It can be divided in two parts, 263 and 99136, that added together give a palindrome (99399).

The spelling of 26399136 in words is "twenty-six million, three hundred ninety-nine thousand, one hundred thirty-six".