26820880 has 20 divisors (see below), whose sum is σ = 62358732. Its totient is φ = 10728320.

The previous prime is 26820851. The next prime is 26820881. The reversal of 26820880 is 8802862.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13512976 + 13307904 = 3676^2 + 3648^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26820881) 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, 167551 + ... + 167710.

Almost surely, 2^26820880 is an apocalyptic number.

26820880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26820880 is an abundant number, since it is smaller than the sum of its proper divisors (35537852).

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

26820880 is a wasteful number, since it uses less digits than its factorization.

26820880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335274 (or 335268 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 26820880 is about 5178.8879115115. The cubic root of 26820880 is about 299.3351201304.

The spelling of 26820880 in words is "twenty-six million, eight hundred twenty thousand, eight hundred eighty".