84168420 has 48 divisors (see below), whose sum is σ = 269340288. Its totient is φ = 19238400.

The previous prime is 84168373. The next prime is 84168421. The reversal of 84168420 is 2486148.

It is not an unprimeable number, because it can be changed into a prime (84168421) 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 15 ways as a sum of consecutive naturals, for example, 99781 + ... + 100620.

It is an arithmetic number, because the mean of its divisors is an integer number (5611256).

Almost surely, 2^84168420 is an apocalyptic number.

It is an amenable number.

84168420 is an abundant number, since it is smaller than the sum of its proper divisors (185171868).

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

84168420 is a wasteful number, since it uses less digits than its factorization.

84168420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200420 (or 200418 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 84168420 is about 9174.3348532741. The cubic root of 84168420 is about 438.2444164492.

It can be divided in two parts, 8416 and 8420, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 84168420 in words is "eighty-four million, one hundred sixty-eight thousand, four hundred twenty".