23280643 has 4 divisors (see below), whose sum is σ = 24505960. Its totient is φ = 22055328.

The previous prime is 23280641. The next prime is 23280671. The reversal of 23280643 is 34608232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23280643 - 2¹ = 23280641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23280641) 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, 612630 + ... + 612667.

It is an arithmetic number, because the mean of its divisors is an integer number (6126490).

Almost surely, 2^23280643 is an apocalyptic number.

23280643 is a deficient number, since it is larger than the sum of its proper divisors (1225317).

23280643 is a wasteful number, since it uses less digits than its factorization.

23280643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225316.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 23280643 is about 4825.0018652846. The cubic root of 23280643 is about 285.5387081855.

Adding to 23280643 its reverse (34608232), we get a palindrome (57888875).

The spelling of 23280643 in words is "twenty-three million, two hundred eighty thousand, six hundred forty-three".