23280745 has 16 divisors (see below), whose sum is σ = 28758528. Its totient is φ = 18083520.

The previous prime is 23280737. The next prime is 23280749. The reversal of 23280745 is 54708232.

It is not a de Polignac number, because 23280745 - 2³ = 23280737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23280749) 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 15 ways as a sum of consecutive naturals, for example, 36580 + ... + 37210.

It is an arithmetic number, because the mean of its divisors is an integer number (1797408).

Almost surely, 2^23280745 is an apocalyptic number.

It is an amenable number.

23280745 is a deficient number, since it is larger than the sum of its proper divisors (5477783).

23280745 is a wasteful number, since it uses less digits than its factorization.

23280745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 23280745 is about 4825.0124352171. The cubic root of 23280745 is about 285.5391251972.

Adding to 23280745 its reverse (54708232), we get a palindrome (77988977).

It can be divided in two parts, 23280 and 745, that added together give a square (24025 = 155²).

The spelling of 23280745 in words is "twenty-three million, two hundred eighty thousand, seven hundred forty-five".