26181216 has 36 divisors (see below), whose sum is σ = 74453652. Its totient is φ = 8726976.

The previous prime is 26181157. The next prime is 26181217. The reversal of 26181216 is 61218162.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 26181216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26181217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45166 + ... + 45741.

It is an arithmetic number, because the mean of its divisors is an integer number (2068157).

Almost surely, 2^26181216 is an apocalyptic number.

It is an amenable number.

26181216 is an abundant number, since it is smaller than the sum of its proper divisors (48272436).

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

26181216 is a wasteful number, since it uses less digits than its factorization.

26181216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90923 (or 90912 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 26181216 is about 5116.7583487986. The cubic root of 26181216 is about 296.9362853495.

Adding to 26181216 its reverse (61218162), we get a palindrome (87399378).

The spelling of 26181216 in words is "twenty-six million, one hundred eighty-one thousand, two hundred sixteen".