23640198 has 8 divisors (see below), whose sum is σ = 47280408. Its totient is φ = 7880064.

The previous prime is 23640193. The next prime is 23640203. The reversal of 23640198 is 89104632.

It is an interprime number because it is at equal distance from previous prime (23640193) and next prime (23640203).

It is a sphenic number, since it is the product of 3 distinct primes.

23640198 is an admirable number.

It is a super-2 number, since 2×23640198² = 1117717922958408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23640193) 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 3 ways as a sum of consecutive naturals, for example, 1970011 + ... + 1970022.

It is an arithmetic number, because the mean of its divisors is an integer number (5910051).

Almost surely, 2^23640198 is an apocalyptic number.

23640198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

23640198 is a wasteful number, since it uses less digits than its factorization.

23640198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940038.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 23640198 is about 4862.1186739939. The cubic root of 23640198 is about 287.0011938099.

The spelling of 23640198 in words is "twenty-three million, six hundred forty thousand, one hundred ninety-eight".