23986391 has 16 divisors (see below), whose sum is σ = 28667520. Its totient is φ = 19780320.

The previous prime is 23986387. The next prime is 23986399. The reversal of 23986391 is 19368932.

It is a cyclic number.

It is not a de Polignac number, because 23986391 - 2² = 23986387 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 (23986399) 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, 7016 + ... + 9858.

It is an arithmetic number, because the mean of its divisors is an integer number (1791720).

Almost surely, 2^23986391 is an apocalyptic number.

23986391 is a deficient number, since it is larger than the sum of its proper divisors (4681129).

23986391 is a wasteful number, since it uses less digits than its factorization.

23986391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926.

The product of its digits is 69984, while the sum is 41.

The square root of 23986391 is about 4897.5903258643. The cubic root of 23986391 is about 288.3953827130.

The spelling of 23986391 in words is "twenty-three million, nine hundred eighty-six thousand, three hundred ninety-one".