23340040 has 16 divisors (see below), whose sum is σ = 52515180. Its totient is φ = 9336000.

The previous prime is 23340019. The next prime is 23340047. The reversal of 23340040 is 4004332.

It can be written as a sum of positive squares in 2 ways, for example, as 22982436 + 357604 = 4794^2 + 598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23339996 and 23340023.

It is not an unprimeable number, because it can be changed into a prime (23340047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291711 + ... + 291790.

Almost surely, 2^23340040 is an apocalyptic number.

23340040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23340040 is an abundant number, since it is smaller than the sum of its proper divisors (29175140).

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

23340040 is a wasteful number, since it uses less digits than its factorization.

23340040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583512 (or 583508 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 23340040 is about 4831.1530714727. The cubic root of 23340040 is about 285.7813380722.

Adding to 23340040 its reverse (4004332), we get a palindrome (27344372).

The spelling of 23340040 in words is "twenty-three million, three hundred forty thousand, forty".