22569890 has 24 divisors (see below), whose sum is σ = 47259612. Its totient is φ = 7738080.

The previous prime is 22569881. The next prime is 22569893. The reversal of 22569890 is 9896522.

It can be written as a sum of positive squares in 2 ways, for example, as 20133169 + 2436721 = 4487^2 + 1561^2 .

It is a super-2 number, since 2×22569890² = 1018799869224200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22569893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22541 + ... + 23520.

Almost surely, 2^22569890 is an apocalyptic number.

22569890 is an abundant number, since it is smaller than the sum of its proper divisors (24689722).

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

22569890 is a wasteful number, since it uses less digits than its factorization.

22569890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46082 (or 46075 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 22569890 is about 4750.7778310504. Note that the first 3 decimals coincide. The cubic root of 22569890 is about 282.6028132315.

The spelling of 22569890 in words is "twenty-two million, five hundred sixty-nine thousand, eight hundred ninety".