23280564 has 12 divisors (see below), whose sum is σ = 54321344. Its totient is φ = 7760184.

The previous prime is 23280563. The next prime is 23280571. The reversal of 23280564 is 46508232.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23280563) 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, 970012 + ... + 970035.

Almost surely, 2^23280564 is an apocalyptic number.

It is an amenable number.

23280564 is an abundant number, since it is smaller than the sum of its proper divisors (31040780).

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

23280564 is a wasteful number, since it uses less digits than its factorization.

23280564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940054 (or 1940052 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 23280564 is about 4824.9936787523. The cubic root of 23280564 is about 285.5383852050.

Adding to 23280564 its reverse (46508232), we get a palindrome (69788796).

The spelling of 23280564 in words is "twenty-three million, two hundred eighty thousand, five hundred sixty-four".