26816881 has 16 divisors (see below), whose sum is σ = 33553408. Its totient is φ = 20865600.

The previous prime is 26816863. The next prime is 26816893. The reversal of 26816881 is 18861862.

It is not a de Polignac number, because 26816881 - 2⁷ = 26816753 is a prime.

It is a super-2 number, since 2×26816881² = 1438290213136322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26816861) 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, 3136 + ... + 7966.

It is an arithmetic number, because the mean of its divisors is an integer number (2097088).

Almost surely, 2^26816881 is an apocalyptic number.

It is an amenable number.

26816881 is a deficient number, since it is larger than the sum of its proper divisors (6736527).

26816881 is a wasteful number, since it uses less digits than its factorization.

26816881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912.

The product of its digits is 36864, while the sum is 40.

The square root of 26816881 is about 5178.5018103695. The cubic root of 26816881 is about 299.3202424102.

The spelling of 26816881 in words is "twenty-six million, eight hundred sixteen thousand, eight hundred eighty-one".