22840385 has 4 divisors (see below), whose sum is σ = 27408468. Its totient is φ = 18272304.

The previous prime is 22840381. The next prime is 22840387. The reversal of 22840385 is 58304822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12645136 + 10195249 = 3556^2 + 3193^2 .

It is a cyclic number.

It is not a de Polignac number, because 22840385 - 2² = 22840381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22840381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2284034 + ... + 2284043.

It is an arithmetic number, because the mean of its divisors is an integer number (6852117).

Almost surely, 2^22840385 is an apocalyptic number.

It is an amenable number.

22840385 is a deficient number, since it is larger than the sum of its proper divisors (4568083).

22840385 is an equidigital number, since it uses as much as digits as its factorization.

22840385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4568082.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 22840385 is about 4779.1615373410. The cubic root of 22840385 is about 283.7273096672.

The spelling of 22840385 in words is "twenty-two million, eight hundred forty thousand, three hundred eighty-five".