143683938 has 24 divisors (see below), whose sum is σ = 311723100. Its totient is φ = 47831904.

The previous prime is 143683937. The next prime is 143683997. The reversal of 143683938 is 839386341.

It can be written as a sum of positive squares in 2 ways, for example, as 123943689 + 19740249 = 11133^2 + 4443^2 .

It is a junction number, because it is equal to n+sod(n) for n = 143683893 and 143683902.

It is not an unprimeable number, because it can be changed into a prime (143683931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10108 + ... + 19736.

Almost surely, 2^143683938 is an apocalyptic number.

143683938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

143683938 is an abundant number, since it is smaller than the sum of its proper divisors (168039162).

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

143683938 is a wasteful number, since it uses less digits than its factorization.

143683938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10466 (or 10463 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 143683938 is about 11986.8235158444. The cubic root of 143683938 is about 523.7645179511.

The spelling of 143683938 in words is "one hundred forty-three million, six hundred eighty-three thousand, nine hundred thirty-eight".