23040720 has 80 divisors (see below), whose sum is σ = 79369920. Its totient is φ = 6143616.

The previous prime is 23040713. The next prime is 23040767. The reversal of 23040720 is 2704032.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23040693 and 23040702.

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 15 ways as a sum of consecutive naturals, for example, 3174 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (992124).

Almost surely, 2^23040720 is an apocalyptic number.

23040720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23040720 is an abundant number, since it is smaller than the sum of its proper divisors (56329200).

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

23040720 is a wasteful number, since it uses less digits than its factorization.

23040720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10689 (or 10677 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 23040720 is about 4800.0749994141. The cubic root of 23040720 is about 284.5544284061.

Adding to 23040720 its reverse (2704032), we get a palindrome (25744752).

The spelling of 23040720 in words is "twenty-three million, forty thousand, seven hundred twenty".