26997568 has 56 divisors (see below), whose sum is σ = 59321192. Its totient is φ = 12109824.

The previous prime is 26997473. The next prime is 26997569. The reversal of 26997568 is 86579962.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8952064 + 18045504 = 2992^2 + 4248^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26997569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30346 + ... + 31222.

It is an arithmetic number, because the mean of its divisors is an integer number (1059307).

Almost surely, 2^26997568 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 26997568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29660596).

26997568 is an abundant number, since it is smaller than the sum of its proper divisors (32323624).

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

26997568 is a wasteful number, since it uses less digits than its factorization.

26997568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 929 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 52.

The square root of 26997568 is about 5195.9183981275. The cubic root of 26997568 is about 299.9909923221.

The spelling of 26997568 in words is "twenty-six million, nine hundred ninety-seven thousand, five hundred sixty-eight".