22406389 has 4 divisors (see below), whose sum is σ = 22441356. Its totient is φ = 22371424.

The previous prime is 22406387. The next prime is 22406411. The reversal of 22406389 is 98360422.

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 5963364 + 16443025 = 2442^2 + 4055^2 .

It is a cyclic number.

It is not a de Polignac number, because 22406389 - 2¹ = 22406387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22406381) 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, 16504 + ... + 17809.

It is an arithmetic number, because the mean of its divisors is an integer number (5610339).

Almost surely, 2^22406389 is an apocalyptic number.

It is an amenable number.

22406389 is a deficient number, since it is larger than the sum of its proper divisors (34967).

22406389 is an equidigital number, since it uses as much as digits as its factorization.

22406389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34966.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 22406389 is about 4733.5387396746. The cubic root of 22406389 is about 281.9187474442.

The spelling of 22406389 in words is "twenty-two million, four hundred six thousand, three hundred eighty-nine".