26983989 has 16 divisors (see below), whose sum is σ = 41058240. Its totient is φ = 17502480.

The previous prime is 26983987. The next prime is 26983993. The reversal of 26983989 is 98938962.

It is not a de Polignac number, because 26983989 - 2¹ = 26983987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26983987) 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, 12507 + ... + 14504.

It is an arithmetic number, because the mean of its divisors is an integer number (2566140).

Almost surely, 2^26983989 is an apocalyptic number.

It is an amenable number.

26983989 is a deficient number, since it is larger than the sum of its proper divisors (14074251).

26983989 is a wasteful number, since it uses less digits than its factorization.

26983989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27057 (or 27051 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 26983989 is about 5194.6115350428. The cubic root of 26983989 is about 299.9406882745.

It can be divided in two parts, 26983 and 989, that added together give a palindrome (27972).

The spelling of 26983989 in words is "twenty-six million, nine hundred eighty-three thousand, nine hundred eighty-nine".