23636140 has 36 divisors (see below), whose sum is σ = 54564048. Its totient is φ = 8594080.

The previous prime is 23636099. The next prime is 23636147. The reversal of 23636140 is 4163632.

It is a super-2 number, since 2×23636140² = 1117334228199200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23636147) 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 11 ways as a sum of consecutive naturals, for example, 2464 + ... + 7303.

It is an arithmetic number, because the mean of its divisors is an integer number (1515668).

Almost surely, 2^23636140 is an apocalyptic number.

23636140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23636140 is an abundant number, since it is smaller than the sum of its proper divisors (30927908).

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

23636140 is a wasteful number, since it uses less digits than its factorization.

23636140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9798 (or 9785 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 23636140 is about 4861.7013482936. The cubic root of 23636140 is about 286.9847709709.

Adding to 23636140 its reverse (4163632), we get a palindrome (27799772).

The spelling of 23636140 in words is "twenty-three million, six hundred thirty-six thousand, one hundred forty".