26217216 has 72 divisors (see below), whose sum is σ = 77549360. Its totient is φ = 8736768.

The previous prime is 26217209. The next prime is 26217223. The reversal of 26217216 is 61271262.

It is an interprime number because it is at equal distance from previous prime (26217209) and next prime (26217223).

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 26217216.

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, 5016 + ... + 8808.

Almost surely, 2^26217216 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 26217216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38774680).

26217216 is an abundant number, since it is smaller than the sum of its proper divisors (51332144).

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

26217216 is an equidigital number, since it uses as much as digits as its factorization.

26217216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818 (or 3798 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 26217216 is about 5120.2749926151. The cubic root of 26217216 is about 297.0723219448.

Adding to 26217216 its reverse (61271262), we get a palindrome (87488478).

The spelling of 26217216 in words is "twenty-six million, two hundred seventeen thousand, two hundred sixteen".