23280560 has 20 divisors (see below), whose sum is σ = 54127488. Its totient is φ = 9312192.

The previous prime is 23280559. The next prime is 23280563. The reversal of 23280560 is 6508232.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (23280563) 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, 145424 + ... + 145583.

Almost surely, 2^23280560 is an apocalyptic number.

23280560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23280560 is an abundant number, since it is smaller than the sum of its proper divisors (30846928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23280560 is a wasteful number, since it uses less digits than its factorization.

23280560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291020 (or 291014 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 23280560 is about 4824.9932642440. The cubic root of 23280560 is about 285.5383688515.

Adding to 23280560 its reverse (6508232), we get a palindrome (29788792).

The spelling of 23280560 in words is "twenty-three million, two hundred eighty thousand, five hundred sixty".