23217280 has 32 divisors (see below), whose sum is σ = 55505340. Its totient is φ = 9286656.

The previous prime is 23217269. The next prime is 23217283. The reversal of 23217280 is 8271232.

It can be written as a sum of positive squares in 2 ways, for example, as 22963264 + 254016 = 4792^2 + 504^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (23217283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17499 + ... + 18778.

Almost surely, 2^23217280 is an apocalyptic number.

23217280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23217280 is an abundant number, since it is smaller than the sum of its proper divisors (32288060).

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

23217280 is an equidigital number, since it uses as much as digits as its factorization.

23217280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36296 (or 36284 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 23217280 is about 4818.4312799914. The cubic root of 23217280 is about 285.2794222736.

The spelling of 23217280 in words is "twenty-three million, two hundred seventeen thousand, two hundred eighty".