23187240 has 96 divisors (see below), whose sum is σ = 77992200. Its totient is φ = 5967360.

The previous prime is 23187217. The next prime is 23187313. The reversal of 23187240 is 4278132.

It can be written as a sum of positive squares in 4 ways, for example, as 20304036 + 2883204 = 4506^2 + 1698^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9330 + ... + 11550.

Almost surely, 2^23187240 is an apocalyptic number.

23187240 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 23187240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38996100).

23187240 is an abundant number, since it is smaller than the sum of its proper divisors (54804960).

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

23187240 is a wasteful number, since it uses less digits than its factorization.

23187240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23187240 is about 4815.3130739340. The cubic root of 23187240 is about 285.1563315906.

The spelling of 23187240 in words is "twenty-three million, one hundred eighty-seven thousand, two hundred forty".