23443728 has 80 divisors (see below), whose sum is σ = 75518976. Its totient is φ = 6088320.

The previous prime is 23443723. The next prime is 23443733. The reversal of 23443728 is 82734432.

It is an interprime number because it is at equal distance from previous prime (23443723) and next prime (23443733).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (23443723) 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 15 ways as a sum of consecutive naturals, for example, 525 + ... + 6867.

Almost surely, 2^23443728 is an apocalyptic number.

23443728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23443728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37759488).

23443728 is an abundant number, since it is smaller than the sum of its proper divisors (52075248).

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

23443728 is a wasteful number, since it uses less digits than its factorization.

23443728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6372 (or 6366 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 23443728 is about 4841.8723651084. The cubic root of 23443728 is about 286.2039069456.

The spelling of 23443728 in words is "twenty-three million, four hundred forty-three thousand, seven hundred twenty-eight".