23640319 has 4 divisors (see below), whose sum is σ = 25030944. Its totient is φ = 22249696.

The previous prime is 23640311. The next prime is 23640341. The reversal of 23640319 is 91304632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23640319 - 2³ = 23640311 is a prime.

It is a super-2 number, since 2×23640319² = 1117729364843522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23640311) 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, 695287 + ... + 695320.

It is an arithmetic number, because the mean of its divisors is an integer number (6257736).

Almost surely, 2^23640319 is an apocalyptic number.

23640319 is a deficient number, since it is larger than the sum of its proper divisors (1390625).

23640319 is a wasteful number, since it uses less digits than its factorization.

23640319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390624.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23640319 is about 4862.1311171132. The cubic root of 23640319 is about 287.0016834714.

The spelling of 23640319 in words is "twenty-three million, six hundred forty thousand, three hundred nineteen".