23389040 has 20 divisors (see below), whose sum is σ = 54379704. Its totient is φ = 9355584.

The previous prime is 23389039. The next prime is 23389043. The reversal of 23389040 is 4098332.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 23388994 and 23389012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23389043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146102 + ... + 146261.

Almost surely, 2^23389040 is an apocalyptic number.

23389040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23389040 is an abundant number, since it is smaller than the sum of its proper divisors (30990664).

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

23389040 is a wasteful number, since it uses less digits than its factorization.

23389040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292376 (or 292370 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 23389040 is about 4836.2216657221. The cubic root of 23389040 is about 285.9811877368.

The spelling of 23389040 in words is "twenty-three million, three hundred eighty-nine thousand, forty".