23040391 has 8 divisors (see below), whose sum is σ = 25200000. Its totient is φ = 20891640.

The previous prime is 23040349. The next prime is 23040403. The reversal of 23040391 is 19304032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23040391 - 2⁷ = 23040263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23040301) 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, 2110 + ... + 7108.

It is an arithmetic number, because the mean of its divisors is an integer number (3150000).

Almost surely, 2^23040391 is an apocalyptic number.

23040391 is a deficient number, since it is larger than the sum of its proper divisors (2159609).

23040391 is a wasteful number, since it uses less digits than its factorization.

23040391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 23040391 is about 4800.0407289939. The cubic root of 23040391 is about 284.5530740090.

The spelling of 23040391 in words is "twenty-three million, forty thousand, three hundred ninety-one".