143840038 has 4 divisors (see below), whose sum is σ = 215760060. Its totient is φ = 71920018.

The previous prime is 143840027. The next prime is 143840063. The reversal of 143840038 is 830048341.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) 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 = 143839991 and 143840009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35960008 + ... + 35960011.

It is an arithmetic number, because the mean of its divisors is an integer number (53940015).

Almost surely, 2^143840038 is an apocalyptic number.

143840038 is a deficient number, since it is larger than the sum of its proper divisors (71920022).

143840038 is an equidigital number, since it uses as much as digits as its factorization.

143840038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71920021.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 143840038 is about 11993.3330646656. Note that the first 3 decimals coincide. The cubic root of 143840038 is about 523.9541240454.

Adding to 143840038 its reverse (830048341), we get a palindrome (973888379).

The spelling of 143840038 in words is "one hundred forty-three million, eight hundred forty thousand, thirty-eight".