143420844 has 72 divisors (see below), whose sum is σ = 392137200. Its totient is φ = 40677504.

The previous prime is 143420773. The next prime is 143420887. The reversal of 143420844 is 448024341.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86794 + ... + 88430.

It is an arithmetic number, because the mean of its divisors is an integer number (5446350).

Almost surely, 2^143420844 is an apocalyptic number.

143420844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143420844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196068600).

143420844 is an abundant number, since it is smaller than the sum of its proper divisors (248716356).

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

143420844 is a wasteful number, since it uses less digits than its factorization.

143420844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 143420844 is about 11975.8441873632. The cubic root of 143420844 is about 523.4446411067. Note that the first 3 decimals are identical.

The spelling of 143420844 in words is "one hundred forty-three million, four hundred twenty thousand, eight hundred forty-four".