23340340 has 24 divisors (see below), whose sum is σ = 50341032. Its totient is φ = 9083520.

The previous prime is 23340319. The next prime is 23340349. The reversal of 23340340 is 4304332.

It can be written as a sum of positive squares in 4 ways, for example, as 853776 + 22486564 = 924^2 + 4742^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23340349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15031 + ... + 16510.

It is an arithmetic number, because the mean of its divisors is an integer number (2097543).

Almost surely, 2^23340340 is an apocalyptic number.

23340340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23340340 is an abundant number, since it is smaller than the sum of its proper divisors (27000692).

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

23340340 is a wasteful number, since it uses less digits than its factorization.

23340340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31587 (or 31585 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 23340340 is about 4831.1841198613. The cubic root of 23340340 is about 285.7825624922.

Adding to 23340340 its reverse (4304332), we get a palindrome (27644672).

The spelling of 23340340 in words is "twenty-three million, three hundred forty thousand, three hundred forty".