23540166 has 32 divisors (see below), whose sum is σ = 56337120. Its totient is φ = 7242912.

The previous prime is 23540161. The next prime is 23540173. The reversal of 23540166 is 66104532.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23540161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16065 + ... + 17468.

It is an arithmetic number, because the mean of its divisors is an integer number (1760535).

Almost surely, 2^23540166 is an apocalyptic number.

23540166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23540166 is an abundant number, since it is smaller than the sum of its proper divisors (32796954).

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

23540166 is a wasteful number, since it uses less digits than its factorization.

23540166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33557 (or 33551 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 23540166 is about 4851.8208952928. The cubic root of 23540166 is about 286.5958123667.

Adding to 23540166 its reverse (66104532), we get a palindrome (89644698).

It can be divided in two parts, 235 and 40166, that added together give a square (40401 = 201²).

The spelling of 23540166 in words is "twenty-three million, five hundred forty thousand, one hundred sixty-six".