23117240 has 16 divisors (see below), whose sum is σ = 52013880. Its totient is φ = 9246880.

The previous prime is 23117239. The next prime is 23117251. The reversal of 23117240 is 4271132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 288926 + ... + 289005.

Almost surely, 2^23117240 is an apocalyptic number.

23117240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23117240 is an abundant number, since it is smaller than the sum of its proper divisors (28896640).

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

23117240 is a wasteful number, since it uses less digits than its factorization.

23117240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577942 (or 577938 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 23117240 is about 4808.0391013385. The cubic root of 23117240 is about 284.8690893592.

Adding to 23117240 its reverse (4271132), we get a palindrome (27388372).

It can be divided in two parts, 231 and 17240, that added together give a palindrome (17471).

The spelling of 23117240 in words is "twenty-three million, one hundred seventeen thousand, two hundred forty".