23640336 has 200 divisors, whose sum is σ = 76970520. Its totient is φ = 6967296.

The previous prime is 23640311. The next prime is 23640341. The reversal of 23640336 is 63304632.

It can be written as a sum of positive squares in 4 ways, for example, as 11696400 + 11943936 = 3420^2 + 3456^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 638910 + ... + 638946.

Almost surely, 2^23640336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23640336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38485260).

23640336 is an abundant number, since it is smaller than the sum of its proper divisors (53330184).

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

23640336 is a wasteful number, since it uses less digits than its factorization.

23640336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

The square root of 23640336 is about 4862.1328653174. The cubic root of 23640336 is about 287.0017522667.

Adding to 23640336 its reverse (63304632), we get a palindrome (86944968).

The spelling of 23640336 in words is "twenty-three million, six hundred forty thousand, three hundred thirty-six".