26809880 has 32 divisors (see below), whose sum is σ = 60512400. Its totient is φ = 10690176.

The previous prime is 26809873. The next prime is 26809883. The reversal of 26809880 is 8890862.

It is a happy number.

It is a super-2 number, since 2×26809880² = 1437539331228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26809883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14699 + ... + 16421.

Almost surely, 2^26809880 is an apocalyptic number.

26809880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26809880 is an abundant number, since it is smaller than the sum of its proper divisors (33702520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26809880 is a wasteful number, since it uses less digits than its factorization.

26809880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 26809880 is about 5177.8257985375. The cubic root of 26809880 is about 299.2941926072.

The spelling of 26809880 in words is "twenty-six million, eight hundred nine thousand, eight hundred eighty".