26990144 has 56 divisors (see below), whose sum is σ = 55824120. Its totient is φ = 12939264.

The previous prime is 26990143. The next prime is 26990147. The reversal of 26990144 is 44109962.

It can be written as a sum of positive squares in 4 ways, for example, as 9684544 + 17305600 = 3112^2 + 4160^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (26990143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247562 + ... + 247670.

Almost surely, 2^26990144 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 26990144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27912060).

26990144 is an abundant number, since it is smaller than the sum of its proper divisors (28833976).

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

26990144 is a wasteful number, since it uses less digits than its factorization.

26990144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 26990144 is about 5195.2039420989. The cubic root of 26990144 is about 299.9634918537.

The spelling of 26990144 in words is "twenty-six million, nine hundred ninety thousand, one hundred forty-four".