26981889 has 16 divisors (see below), whose sum is σ = 39723264. Its totient is φ = 16154000.

The previous prime is 26981887. The next prime is 26981909. The reversal of 26981889 is 98818962.

It is a cyclic number.

It is not a de Polignac number, because 26981889 - 2¹ = 26981887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26981887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2187 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (2482704).

Almost surely, 2^26981889 is an apocalyptic number.

It is an amenable number.

26981889 is a deficient number, since it is larger than the sum of its proper divisors (12741375).

26981889 is a wasteful number, since it uses less digits than its factorization.

26981889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9948.

The product of its digits is 497664, while the sum is 51.

The square root of 26981889 is about 5194.4093985746. The cubic root of 26981889 is about 299.9329072185.

The spelling of 26981889 in words is "twenty-six million, nine hundred eighty-one thousand, eight hundred eighty-nine".