26890555 has 4 divisors (see below), whose sum is σ = 32268672. Its totient is φ = 21512440.

The previous prime is 26890553. The next prime is 26890559. The reversal of 26890555 is 55509862.

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

It is not a de Polignac number, because 26890555 - 2¹ = 26890553 is a prime.

It is a super-3 number, since 3×26890555³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26890553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2689051 + ... + 2689060.

It is an arithmetic number, because the mean of its divisors is an integer number (8067168).

Almost surely, 2^26890555 is an apocalyptic number.

26890555 is a deficient number, since it is larger than the sum of its proper divisors (5378117).

26890555 is an equidigital number, since it uses as much as digits as its factorization.

26890555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378116.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 26890555 is about 5185.6103787307. The cubic root of 26890555 is about 299.5940992110.

The spelling of 26890555 in words is "twenty-six million, eight hundred ninety thousand, five hundred fifty-five".