26688444 has 12 divisors (see below), whose sum is σ = 62273064. Its totient is φ = 8896144.

The previous prime is 26688421. The next prime is 26688449. The reversal of 26688444 is 44488662.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×26688444² = 1424546086282272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26688396 and 26688405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26688449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112007 + ... + 1112030.

It is an arithmetic number, because the mean of its divisors is an integer number (5189422).

Almost surely, 2^26688444 is an apocalyptic number.

It is an amenable number.

26688444 is an abundant number, since it is smaller than the sum of its proper divisors (35584620).

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

26688444 is a wasteful number, since it uses less digits than its factorization.

26688444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224044 (or 2224042 counting only the distinct ones).

The product of its digits is 294912, while the sum is 42.

The square root of 26688444 is about 5166.0859458588. The cubic root of 26688444 is about 298.8416218459.

The spelling of 26688444 in words is "twenty-six million, six hundred eighty-eight thousand, four hundred forty-four".