23849439 has 4 divisors (see below), whose sum is σ = 31799256. Its totient is φ = 15899624.

The previous prime is 23849429. The next prime is 23849443. The reversal of 23849439 is 93494832.

It is a happy number.

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 23849439 - 2⁹ = 23848927 is a prime.

It is a super-2 number, since 2×23849439² = 1137591481229442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23849439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23849429) 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, 3974904 + ... + 3974909.

It is an arithmetic number, because the mean of its divisors is an integer number (7949814).

Almost surely, 2^23849439 is an apocalyptic number.

23849439 is a deficient number, since it is larger than the sum of its proper divisors (7949817).

23849439 is an equidigital number, since it uses as much as digits as its factorization.

23849439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7949816.

The product of its digits is 186624, while the sum is 42.

The square root of 23849439 is about 4883.5887418987. The cubic root of 23849439 is about 287.8454634856.

The spelling of 23849439 in words is "twenty-three million, eight hundred forty-nine thousand, four hundred thirty-nine".