23120340 has 96 divisors (see below), whose sum is σ = 72213120. Its totient is φ = 5492736.

The previous prime is 23120333. The next prime is 23120347. The reversal of 23120340 is 4302132.

It is an interprime number because it is at equal distance from previous prime (23120333) and next prime (23120347).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120347) 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 31 ways as a sum of consecutive naturals, for example, 18784 + ... + 19976.

It is an arithmetic number, because the mean of its divisors is an integer number (752220).

Almost surely, 2^23120340 is an apocalyptic number.

23120340 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 23120340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36106560).

23120340 is an abundant number, since it is smaller than the sum of its proper divisors (49092780).

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

23120340 is a wasteful number, since it uses less digits than its factorization.

23120340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23120340 is about 4808.3614672776. The cubic root of 23120340 is about 284.8818223484.

Adding to 23120340 its reverse (4302132), we get a palindrome (27422472).

The spelling of 23120340 in words is "twenty-three million, one hundred twenty thousand, three hundred forty".