143728638 has 8 divisors (see below), whose sum is σ = 287457288. Its totient is φ = 47909544.

The previous prime is 143728631. The next prime is 143728643. The reversal of 143728638 is 836827341.

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

143728638 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 143728638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143728631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11977381 + ... + 11977392.

It is an arithmetic number, because the mean of its divisors is an integer number (35932161).

Almost surely, 2^143728638 is an apocalyptic number.

143728638 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.

143728638 is a wasteful number, since it uses less digits than its factorization.

143728638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23954778.

The product of its digits is 193536, while the sum is 42.

The square root of 143728638 is about 11988.6879182002. The cubic root of 143728638 is about 523.8188266114.

The spelling of 143728638 in words is "one hundred forty-three million, seven hundred twenty-eight thousand, six hundred thirty-eight".