26380891 has 4 divisors (see below), whose sum is σ = 26407800. Its totient is φ = 26353984.

The previous prime is 26380883. The next prime is 26380903. The reversal of 26380891 is 19808362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26380891 - 2³ = 26380883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26380891.

It is not an unprimeable number, because it can be changed into a prime (26383891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11926 + ... + 13963.

It is an arithmetic number, because the mean of its divisors is an integer number (6601950).

Almost surely, 2^26380891 is an apocalyptic number.

26380891 is a deficient number, since it is larger than the sum of its proper divisors (26909).

26380891 is a wasteful number, since it uses less digits than its factorization.

26380891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26908.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 26380891 is about 5136.2331528076. The cubic root of 26380891 is about 297.6892508629.

The spelling of 26380891 in words is "twenty-six million, three hundred eighty thousand, eight hundred ninety-one".