22628549 has 4 divisors (see below), whose sum is σ = 22712940. Its totient is φ = 22544160.

The previous prime is 22628533. The next prime is 22628579. The reversal of 22628549 is 94582622.

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 940900 + 21687649 = 970^2 + 4657^2 .

It is a cyclic number.

It is not a de Polignac number, because 22628549 - 2⁴ = 22628533 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 (22628579) 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 3 ways as a sum of consecutive naturals, for example, 41792 + ... + 42329.

It is an arithmetic number, because the mean of its divisors is an integer number (5678235).

Almost surely, 2^22628549 is an apocalyptic number.

It is an amenable number.

22628549 is a deficient number, since it is larger than the sum of its proper divisors (84391).

22628549 is an equidigital number, since it uses as much as digits as its factorization.

22628549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84390.

The product of its digits is 69120, while the sum is 38.

The square root of 22628549 is about 4756.9474455789. The cubic root of 22628549 is about 282.8474290711.

The spelling of 22628549 in words is "twenty-two million, six hundred twenty-eight thousand, five hundred forty-nine".