23861409 has 16 divisors (see below), whose sum is σ = 37377984. Its totient is φ = 13348800.

The previous prime is 23861401. The next prime is 23861417. The reversal of 23861409 is 90416832.

It is an interprime number because it is at equal distance from previous prime (23861401) and next prime (23861417).

It is not a de Polignac number, because 23861409 - 2³ = 23861401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 23861409.

It is not an unprimeable number, because it can be changed into a prime (23861401) 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, 27382 + ... + 28239.

It is an arithmetic number, because the mean of its divisors is an integer number (2336124).

Almost surely, 2^23861409 is an apocalyptic number.

It is an amenable number.

23861409 is a deficient number, since it is larger than the sum of its proper divisors (13516575).

23861409 is a wasteful number, since it uses less digits than its factorization.

23861409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55648.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 23861409 is about 4884.8141213356. The cubic root of 23861409 is about 287.8936118428.

The spelling of 23861409 in words is "twenty-three million, eight hundred sixty-one thousand, four hundred nine".