84811212 has 120 divisors (see below), whose sum is σ = 243936000. Its totient is φ = 25575264.

The previous prime is 84811211. The next prime is 84811217. The reversal of 84811212 is 21211848.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (84811211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 141289 + ... + 141887.

It is an arithmetic number, because the mean of its divisors is an integer number (2032800).

Almost surely, 2^84811212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84811212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121968000).

84811212 is an abundant number, since it is smaller than the sum of its proper divisors (159124788).

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

84811212 is a wasteful number, since it uses less digits than its factorization.

84811212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 646 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 84811212 is about 9209.3002991541. The cubic root of 84811212 is about 439.3572087935.

The spelling of 84811212 in words is "eighty-four million, eight hundred eleven thousand, two hundred twelve".