23309280 has 72 divisors (see below), whose sum is σ = 79547832. Its totient is φ = 6215424.

The previous prime is 23309267. The next prime is 23309287. The reversal of 23309280 is 8290332.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23309287) 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 11 ways as a sum of consecutive naturals, for example, 6654 + ... + 9533.

It is an arithmetic number, because the mean of its divisors is an integer number (1104831).

Almost surely, 2^23309280 is an apocalyptic number.

23309280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23309280 is an abundant number, since it is smaller than the sum of its proper divisors (56238552).

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

23309280 is a wasteful number, since it uses less digits than its factorization.

23309280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16208 (or 16197 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 23309280 is about 4827.9685168816. The cubic root of 23309280 is about 285.6557384798.

The spelling of 23309280 in words is "twenty-three million, three hundred nine thousand, two hundred eighty".