23280445 has 4 divisors (see below), whose sum is σ = 27936540. Its totient is φ = 18624352.

The previous prime is 23280427. The next prime is 23280449. The reversal of 23280445 is 54408232.

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 12659364 + 10621081 = 3558^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 23280445 - 2⁷ = 23280317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23280449) 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, 2328040 + ... + 2328049.

It is an arithmetic number, because the mean of its divisors is an integer number (6984135).

Almost surely, 2^23280445 is an apocalyptic number.

It is an amenable number.

23280445 is a deficient number, since it is larger than the sum of its proper divisors (4656095).

23280445 is an equidigital number, since it uses as much as digits as its factorization.

23280445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4656094.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 23280445 is about 4824.9813471142. The cubic root of 23280445 is about 285.5378986886.

Adding to 23280445 its reverse (54408232), we get a palindrome (77688677).

The spelling of 23280445 in words is "twenty-three million, two hundred eighty thousand, four hundred forty-five".