143181428 has 24 divisors (see below), whose sum is σ = 271914720. Its totient is φ = 65576160.

The previous prime is 143181427. The next prime is 143181449. The reversal of 143181428 is 824181341.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 143181394 and 143181403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143181421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3698 + ... + 17321.

It is an arithmetic number, because the mean of its divisors is an integer number (11329780).

Almost surely, 2^143181428 is an apocalyptic number.

It is an amenable number.

143181428 is a deficient number, since it is larger than the sum of its proper divisors (128733292).

143181428 is a wasteful number, since it uses less digits than its factorization.

143181428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21167 (or 21165 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 143181428 is about 11965.8442242911. The cubic root of 143181428 is about 523.1532124755.

The spelling of 143181428 in words is "one hundred forty-three million, one hundred eighty-one thousand, four hundred twenty-eight".