22805397 has 36 divisors (see below), whose sum is σ = 35871264. Its totient is φ = 13933920.

The previous prime is 22805383. The next prime is 22805407. The reversal of 22805397 is 79350822.

It is a happy number.

It is not a de Polignac number, because 22805397 - 2¹⁰ = 22804373 is a prime.

It is a super-2 number, since 2×22805397² = 1040172264655218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22805327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 174022 + ... + 174152.

It is an arithmetic number, because the mean of its divisors is an integer number (996424).

Almost surely, 2^22805397 is an apocalyptic number.

It is an amenable number.

22805397 is a deficient number, since it is larger than the sum of its proper divisors (13065867).

22805397 is a wasteful number, since it uses less digits than its factorization.

22805397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 22805397 is about 4775.4996597215. The cubic root of 22805397 is about 283.5823599164.

It can be divided in two parts, 228053 and 97, that added together give a triangular number (228150 = T₆₇₅).

The spelling of 22805397 in words is "twenty-two million, eight hundred five thousand, three hundred ninety-seven".