84219872 has 36 divisors (see below), whose sum is σ = 182260008. Its totient is φ = 38280000.

The previous prime is 84219847. The next prime is 84219931. The reversal of 84219872 is 27891248.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 7004 + ... + 14747.

It is an arithmetic number, because the mean of its divisors is an integer number (5062778).

Almost surely, 2^84219872 is an apocalyptic number.

It is an amenable number.

84219872 is an abundant number, since it is smaller than the sum of its proper divisors (98040136).

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

84219872 is a wasteful number, since it uses less digits than its factorization.

84219872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21783 (or 21764 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 84219872 is about 9177.1385518581. The cubic root of 84219872 is about 438.3336975938. Note that the first 3 decimals are identical.

The spelling of 84219872 in words is "eighty-four million, two hundred nineteen thousand, eight hundred seventy-two".