23440128 has 72 divisors (see below), whose sum is σ = 65146368. Its totient is φ = 7468032.

The previous prime is 23440099. The next prime is 23440133. The reversal of 23440128 is 82104432.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 23440098 and 23440107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17001 + ... + 18327.

Almost surely, 2^23440128 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 23440128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32573184).

23440128 is an abundant number, since it is smaller than the sum of its proper divisors (41706240).

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

23440128 is a wasteful number, since it uses less digits than its factorization.

23440128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 23440128 is about 4841.5005938242. The cubic root of 23440128 is about 286.1892564485.

The spelling of 23440128 in words is "twenty-three million, four hundred forty thousand, one hundred twenty-eight".