143131728 has 20 divisors (see below), whose sum is σ = 369757088. Its totient is φ = 47710560.

The previous prime is 143131727. The next prime is 143131739. The reversal of 143131728 is 827131341.

It is a junction number, because it is equal to n+sod(n) for n = 143131695 and 143131704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143131727) 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, 1490908 + ... + 1491003.

Almost surely, 2^143131728 is an apocalyptic number.

It is an amenable number.

143131728 is an abundant number, since it is smaller than the sum of its proper divisors (226625360).

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

143131728 is a wasteful number, since it uses less digits than its factorization.

143131728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981922 (or 2981916 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 143131728 is about 11963.7672996427. The cubic root of 143131728 is about 523.0926745412.

The spelling of 143131728 in words is "one hundred forty-three million, one hundred thirty-one thousand, seven hundred twenty-eight".