26990288 has 60 divisors (see below), whose sum is σ = 59957100. Its totient is φ = 11698176.

The previous prime is 26990287. The next prime is 26990291. The reversal of 26990288 is 88209962.

It can be written as a sum of positive squares in 6 ways, for example, as 652864 + 26337424 = 808^2 + 5132^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26990287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59888 + ... + 60336.

It is an arithmetic number, because the mean of its divisors is an integer number (999285).

Almost surely, 2^26990288 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 26990288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29978550).

26990288 is an abundant number, since it is smaller than the sum of its proper divisors (32966812).

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

26990288 is a wasteful number, since it uses less digits than its factorization.

26990288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 26990288 is about 5195.2178010166. The cubic root of 26990288 is about 299.9640253159.

The spelling of 26990288 in words is "twenty-six million, nine hundred ninety thousand, two hundred eighty-eight".