23307040 has 96 divisors (see below), whose sum is σ = 58834944. Its totient is φ = 8709120.

The previous prime is 23307029. The next prime is 23307043. The reversal of 23307040 is 4070332.

It is a super-2 number, since 2×23307040² = 1086436227123200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23306999 and 23307017.

It is not an unprimeable number, because it can be changed into a prime (23307043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183457 + ... + 183583.

It is an arithmetic number, because the mean of its divisors is an integer number (612864).

Almost surely, 2^23307040 is an apocalyptic number.

23307040 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 23307040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29417472).

23307040 is an abundant number, since it is smaller than the sum of its proper divisors (35527904).

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

23307040 is a wasteful number, since it uses less digits than its factorization.

23307040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 23307040 is about 4827.7365296793. The cubic root of 23307040 is about 285.6465877703.

Adding to 23307040 its reverse (4070332), we get a palindrome (27377372).

The spelling of 23307040 in words is "twenty-three million, three hundred seven thousand, forty".