23440164 has 48 divisors (see below), whose sum is σ = 59996160. Its totient is φ = 7063840.

The previous prime is 23440159. The next prime is 23440171. The reversal of 23440164 is 46104432.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31177 + ... + 31919.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^23440164 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 23440164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29998080).

23440164 is an abundant number, since it is smaller than the sum of its proper divisors (36555996).

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

23440164 is a wasteful number, since it uses less digits than its factorization.

23440164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 23440164 is about 4841.5043116783. The cubic root of 23440164 is about 286.1894029609.

Adding to 23440164 its reverse (46104432), we get a palindrome (69544596).

The spelling of 23440164 in words is "twenty-three million, four hundred forty thousand, one hundred sixty-four".