84168424 has 8 divisors (see below), whose sum is σ = 157815810. Its totient is φ = 42084208.

The previous prime is 84168421. The next prime is 84168433. The reversal of 84168424 is 42486148.

It can be written as a sum of positive squares in only one way, i.e., 84088900 + 79524 = 9170^2 + 282^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 5260519 + ... + 5260534.

Almost surely, 2^84168424 is an apocalyptic number.

It is an amenable number.

84168424 is a deficient number, since it is larger than the sum of its proper divisors (73647386).

84168424 is a wasteful number, since it uses less digits than its factorization.

84168424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10521059 (or 10521055 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 84168424 is about 9174.3350712736. The cubic root of 84168424 is about 438.2444233915.

The spelling of 84168424 in words is "eighty-four million, one hundred sixty-eight thousand, four hundred twenty-four".