26989056 has 60 divisors (see below), whose sum is σ = 77905542. Its totient is φ = 8994816.

The previous prime is 26989009. The next prime is 26989069. The reversal of 26989056 is 65098962.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 10342656 = 4080^2 + 3216^2 .

It is a super-2 number, since 2×26989056² = 1456818287542272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1680 + ... + 7536.

Almost surely, 2^26989056 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 26989056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38952771).

26989056 is an abundant number, since it is smaller than the sum of its proper divisors (50916486).

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

26989056 is an equidigital number, since it uses as much as digits as its factorization.

26989056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5881 (or 5862 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 26989056 is about 5195.0992290812. The cubic root of 26989056 is about 299.9594611889.

The spelling of 26989056 in words is "twenty-six million, nine hundred eighty-nine thousand, fifty-six".