84143982 has 128 divisors (see below), whose sum is σ = 209018880. Its totient is φ = 22302720.

The previous prime is 84143953. The next prime is 84144001. The reversal of 84143982 is 28934148.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 84143982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 945394 + ... + 945482.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^84143982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84143982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104509440).

84143982 is an abundant number, since it is smaller than the sum of its proper divisors (124874898).

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

84143982 is a wasteful number, since it uses less digits than its factorization.

84143982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178.

The product of its digits is 55296, while the sum is 39.

The square root of 84143982 is about 9173.0028889127. The cubic root of 84143982 is about 438.2019981101.

The spelling of 84143982 in words is "eighty-four million, one hundred forty-three thousand, nine hundred eighty-two".