26939891 has 16 divisors (see below), whose sum is σ = 31328640. Its totient is φ = 22907520.

The previous prime is 26939881. The next prime is 26939893. The reversal of 26939891 is 19893962.

It is a cyclic number.

It is not a de Polignac number, because 26939891 - 2⁶ = 26939827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26939893) 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, 16571 + ... + 18123.

It is an arithmetic number, because the mean of its divisors is an integer number (1958040).

Almost surely, 2^26939891 is an apocalyptic number.

26939891 is a deficient number, since it is larger than the sum of its proper divisors (4388749).

26939891 is a wasteful number, since it uses less digits than its factorization.

26939891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666.

The product of its digits is 209952, while the sum is 47.

The square root of 26939891 is about 5190.3652087305. The cubic root of 26939891 is about 299.7772086618. Note that the first 3 decimals are identical.

The spelling of 26939891 in words is "twenty-six million, nine hundred thirty-nine thousand, eight hundred ninety-one".