26988025 has 9 divisors (see below), whose sum is σ = 33497391. Its totient is φ = 21569640.

The previous prime is 26987981. The next prime is 26988089. The reversal of 26988025 is 52088962.

The square root of 26988025 is 5195.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9715689 + 17272336 = 3117^2 + 4156^2 .

It is not a de Polignac number, because 26988025 - 2¹⁷ = 26856953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25456 + ... + 26494.

Almost surely, 2^26988025 is an apocalyptic number.

26988025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

26988025 is the 5195-th square number.

26988025 is the 2598-th centered octagonal number.

It is an amenable number.

26988025 is a deficient number, since it is larger than the sum of its proper divisors (6509366).

26988025 is an frugal number, since it uses more digits than its factorization.

26988025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The cubic root of 26988025 is about 299.9556415896.

The spelling of 26988025 in words is "twenty-six million, nine hundred eighty-eight thousand, twenty-five".