143238138 has 8 divisors (see below), whose sum is σ = 286476288. Its totient is φ = 47746044.

The previous prime is 143238119. The next prime is 143238167. The reversal of 143238138 is 831832341.

143238138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

143238138 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 143238099 and 143238108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11936506 + ... + 11936517.

It is an arithmetic number, because the mean of its divisors is an integer number (35809536).

Almost surely, 2^143238138 is an apocalyptic number.

143238138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

143238138 is a wasteful number, since it uses less digits than its factorization.

143238138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23873028.

The product of its digits is 13824, while the sum is 33.

The square root of 143238138 is about 11968.2136511678. The cubic root of 143238138 is about 523.2222719503. Note that the first 4 decimals are identical.

The spelling of 143238138 in words is "one hundred forty-three million, two hundred thirty-eight thousand, one hundred thirty-eight".