22928641 has 4 divisors (see below), whose sum is σ = 23548372. Its totient is φ = 22308912.

The previous prime is 22928629. The next prime is 22928651. The reversal of 22928641 is 14682922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14682922 = 2 ⋅7341461.

It can be written as a sum of positive squares in 2 ways, for example, as 22127616 + 801025 = 4704^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 22928641 - 2⁷ = 22928513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22928597 and 22928606.

It is not an unprimeable number, because it can be changed into a prime (22928651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309810 + ... + 309883.

It is an arithmetic number, because the mean of its divisors is an integer number (5887093).

Almost surely, 2^22928641 is an apocalyptic number.

22928641 is the 2560-th centered heptagonal number.

It is an amenable number.

22928641 is a deficient number, since it is larger than the sum of its proper divisors (619731).

22928641 is an equidigital number, since it uses as much as digits as its factorization.

22928641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619730.

The product of its digits is 13824, while the sum is 34.

The square root of 22928641 is about 4788.3860537764. The cubic root of 22928641 is about 284.0922838694.

The spelling of 22928641 in words is "twenty-two million, nine hundred twenty-eight thousand, six hundred forty-one".