23438140 has 24 divisors (see below), whose sum is σ = 53695152. Its totient is φ = 8522880.

The previous prime is 23438123. The next prime is 23438167. The reversal of 23438140 is 4183432.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 53049 + ... + 53488.

It is an arithmetic number, because the mean of its divisors is an integer number (2237298).

Almost surely, 2^23438140 is an apocalyptic number.

23438140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23438140 is an abundant number, since it is smaller than the sum of its proper divisors (30257012).

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

23438140 is a wasteful number, since it uses less digits than its factorization.

23438140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106557 (or 106555 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 23438140 is about 4841.2952812238. The cubic root of 23438140 is about 286.1811654755.

The spelling of 23438140 in words is "twenty-three million, four hundred thirty-eight thousand, one hundred forty".