23640180 has 96 divisors (see below), whose sum is σ = 70761600. Its totient is φ = 5879808.

The previous prime is 23640137. The next prime is 23640181. The reversal of 23640180 is 8104632.

It is a happy number.

It is a super-2 number, since 2×23640180² = 1117716220864800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23640180.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23640181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101344 + ... + 101576.

It is an arithmetic number, because the mean of its divisors is an integer number (737100).

Almost surely, 2^23640180 is an apocalyptic number.

23640180 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 23640180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

23640180 is an abundant number, since it is smaller than the sum of its proper divisors (47121420).

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

23640180 is a wasteful number, since it uses less digits than its factorization.

23640180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 23640180 is about 4862.1168229486. The cubic root of 23640180 is about 287.0011209675.

The spelling of 23640180 in words is "twenty-three million, six hundred forty thousand, one hundred eighty".