26988816 has 80 divisors (see below), whose sum is σ = 74370240. Its totient is φ = 8409600.

The previous prime is 26988791. The next prime is 26988823. The reversal of 26988816 is 61888962.

Added to its reverse (61888962) it gives a triangular number (88877778 = T₁₃₃₃₂).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91966 + ... + 92258.

It is an arithmetic number, because the mean of its divisors is an integer number (929628).

Almost surely, 2^26988816 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 26988816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37185120).

26988816 is an abundant number, since it is smaller than the sum of its proper divisors (47381424).

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

26988816 is a wasteful number, since it uses less digits than its factorization.

26988816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 418 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 26988816 is about 5195.0761303373. The cubic root of 26988816 is about 299.9585720571.

Adding to 26988816 its reverse (61888962), we get a triangular number (88877778 = T₁₃₃₃₂).

The spelling of 26988816 in words is "twenty-six million, nine hundred eighty-eight thousand, eight hundred sixteen".