23391280 has 80 divisors (see below), whose sum is σ = 62496000. Its totient is φ = 8052480.

The previous prime is 23391271. The next prime is 23391281. The reversal of 23391280 is 8219332.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (23391281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16021 + ... + 17419.

It is an arithmetic number, because the mean of its divisors is an integer number (781200).

Almost surely, 2^23391280 is an apocalyptic number.

23391280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23391280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31248000).

23391280 is an abundant number, since it is smaller than the sum of its proper divisors (39104720).

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

23391280 is a wasteful number, since it uses less digits than its factorization.

23391280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442 (or 1436 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 23391280 is about 4836.4532459231. The cubic root of 23391280 is about 285.9903170471.

The spelling of 23391280 in words is "twenty-three million, three hundred ninety-one thousand, two hundred eighty".