23838721 has 8 divisors (see below), whose sum is σ = 24684800. Its totient is φ = 22997520.

The previous prime is 23838719. The next prime is 23838751. The reversal of 23838721 is 12783832.

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

It is a cyclic number.

It is not a de Polignac number, because 23838721 - 2¹ = 23838719 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23838751) 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, 10735 + ... + 12763.

It is an arithmetic number, because the mean of its divisors is an integer number (3085600).

It is a Proth number, since it is equal to 1455 ⋅ 2¹⁴ + 1 and 1455 < 2¹⁴.

Almost surely, 2^23838721 is an apocalyptic number.

It is an amenable number.

23838721 is a deficient number, since it is larger than the sum of its proper divisors (846079).

23838721 is a wasteful number, since it uses less digits than its factorization.

23838721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its digits is 16128, while the sum is 34.

The square root of 23838721 is about 4882.4912698335. The cubic root of 23838721 is about 287.8023375243.

The spelling of 23838721 in words is "twenty-three million, eight hundred thirty-eight thousand, seven hundred twenty-one".