23409438 has 64 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 6814080.

The previous prime is 23409437. The next prime is 23409457. The reversal of 23409438 is 83490432.

It is a junction number, because it is equal to n+sod(n) for n = 23409399 and 23409408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23409437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178633 + ... + 178763.

It is an arithmetic number, because the mean of its divisors is an integer number (831600).

Almost surely, 2^23409438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23409438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26611200).

23409438 is an abundant number, since it is smaller than the sum of its proper divisors (29812962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23409438 is a wasteful number, since it uses less digits than its factorization.

23409438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 23409438 is about 4838.3300838202. The cubic root of 23409438 is about 286.0643000161.

The spelling of 23409438 in words is "twenty-three million, four hundred nine thousand, four hundred thirty-eight".