84821412 has 48 divisors (see below), whose sum is σ = 217183680. Its totient is φ = 25603968.

The previous prime is 84821389. The next prime is 84821419. The reversal of 84821412 is 21412848.

It is a self number, because there is not a number n which added to its sum of digits gives 84821412.

It is not an unprimeable number, because it can be changed into a prime (84821419) 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, 3139 + ... + 13397.

It is an arithmetic number, because the mean of its divisors is an integer number (4524660).

Almost surely, 2^84821412 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 84821412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108591840).

84821412 is an abundant number, since it is smaller than the sum of its proper divisors (132362268).

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

84821412 is a wasteful number, since it uses less digits than its factorization.

84821412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332 (or 10330 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 84821412 is about 9209.8540705051. The cubic root of 84821412 is about 439.3748214958.

The spelling of 84821412 in words is "eighty-four million, eight hundred twenty-one thousand, four hundred twelve".