23438736 has 60 divisors (see below), whose sum is σ = 66124240. Its totient is φ = 7750080.

The previous prime is 23438731. The next prime is 23438749. The reversal of 23438736 is 63783432.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 23438736.

It is not an unprimeable number, because it can be changed into a prime (23438731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19431 + ... + 20601.

Almost surely, 2^23438736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23438736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33062120).

23438736 is an abundant number, since it is smaller than the sum of its proper divisors (42685504).

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

23438736 is a wasteful number, since it uses less digits than its factorization.

23438736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1315 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 23438736 is about 4841.3568346074. The cubic root of 23438736 is about 286.1835911874.

The spelling of 23438736 in words is "twenty-three million, four hundred thirty-eight thousand, seven hundred thirty-six".