26820290 has 16 divisors (see below), whose sum is σ = 55173312. Its totient is φ = 9195504.

The previous prime is 26820289. The next prime is 26820293. The reversal of 26820290 is 9202862.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26820293) 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 7 ways as a sum of consecutive naturals, for example, 191504 + ... + 191643.

It is an arithmetic number, because the mean of its divisors is an integer number (3448332).

Almost surely, 2^26820290 is an apocalyptic number.

26820290 is an abundant number, since it is smaller than the sum of its proper divisors (28353022).

26820290 is a wasteful number, since it uses less digits than its factorization.

26820290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383161.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 26820290 is about 5178.8309491622. The cubic root of 26820290 is about 299.3329252109.

The spelling of 26820290 in words is "twenty-six million, eight hundred twenty thousand, two hundred ninety".