84170212 has 48 divisors (see below), whose sum is σ = 173916288. Its totient is φ = 34894080.

The previous prime is 84170183. The next prime is 84170231. The reversal of 84170212 is 21207148.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 180003 + ... + 180469.

It is an arithmetic number, because the mean of its divisors is an integer number (3623256).

Almost surely, 2^84170212 is an apocalyptic number.

84170212 is a gapful number since it is divisible by the number (82) 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 84170212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86958144).

84170212 is an abundant number, since it is smaller than the sum of its proper divisors (89746076).

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

84170212 is a wasteful number, since it uses less digits than its factorization.

84170212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 84170212 is about 9174.4325165102. The cubic root of 84170212 is about 438.2475265960.

The spelling of 84170212 in words is "eighty-four million, one hundred seventy thousand, two hundred twelve".