22628657 has 2 divisors, whose sum is σ = 22628658. Its totient is φ = 22628656.

The previous prime is 22628651. The next prime is 22628689. The reversal of 22628657 is 75682622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22316176 + 312481 = 4724^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 22628657 - 2⁸ = 22628401 is a prime.

It is a super-2 number, since 2×22628657² = 1024112235247298, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22628657.

It is not a weakly prime, because it can be changed into another prime (22628651) 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 as a sum of consecutive naturals, namely, 11314328 + 11314329.

It is an arithmetic number, because the mean of its divisors is an integer number (11314329).

Almost surely, 2^22628657 is an apocalyptic number.

It is an amenable number.

22628657 is a deficient number, since it is larger than the sum of its proper divisors (1).

22628657 is an equidigital number, since it uses as much as digits as its factorization.

22628657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 22628657 is about 4756.9587973831. The cubic root of 22628657 is about 282.8478790554.

The spelling of 22628657 in words is "twenty-two million, six hundred twenty-eight thousand, six hundred fifty-seven".