22065290 has 16 divisors (see below), whose sum is σ = 42772968. Its totient is φ = 8147136.

The previous prime is 22065223. The next prime is 22065293. The reversal of 22065290 is 9256022.

It can be written as a sum of positive squares in 4 ways, for example, as 7678441 + 14386849 = 2771^2 + 3793^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (22065293) 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, 84737 + ... + 84996.

Almost surely, 2^22065290 is an apocalyptic number.

22065290 is a deficient number, since it is larger than the sum of its proper divisors (20707678).

22065290 is a wasteful number, since it uses less digits than its factorization.

22065290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169753.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22065290 is about 4697.3705410581. The cubic root of 22065290 is about 280.4808489270.

The spelling of 22065290 in words is "twenty-two million, sixty-five thousand, two hundred ninety".