23336640 has 224 divisors, whose sum is σ = 85709760. Its totient is φ = 5971968.

The previous prime is 23336627. The next prime is 23336641. The reversal of 23336640 is 4663332.

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

It is not an unprimeable number, because it can be changed into a prime (23336641) 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, 319644 + ... + 319716.

Almost surely, 2^23336640 is an apocalyptic number.

23336640 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 23336640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42854880).

23336640 is an abundant number, since it is smaller than the sum of its proper divisors (62373120).

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

23336640 is a wasteful number, since it uses less digits than its factorization.

23336640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 120 counting only the distinct ones).

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

The square root of 23336640 is about 4830.8011757885. The cubic root of 23336640 is about 285.7674605791.

Adding to 23336640 its reverse (4663332), we get a palindrome (27999972).

The spelling of 23336640 in words is "twenty-three million, three hundred thirty-six thousand, six hundred forty".