84112820 has 24 divisors (see below), whose sum is σ = 192695328. Its totient is φ = 30586400.

The previous prime is 84112813. The next prime is 84112823. The reversal of 84112820 is 2821148.

It is a self number, because there is not a number n which added to its sum of digits gives 84112820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84112823) 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 7 ways as a sum of consecutive naturals, for example, 190946 + ... + 191385.

It is an arithmetic number, because the mean of its divisors is an integer number (8028972).

Almost surely, 2^84112820 is an apocalyptic number.

It is an amenable number.

84112820 is an abundant number, since it is smaller than the sum of its proper divisors (108582508).

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

84112820 is a wasteful number, since it uses less digits than its factorization.

84112820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382351 (or 382349 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 84112820 is about 9171.3041602599. The cubic root of 84112820 is about 438.1478966506.

Adding to 84112820 its reverse (2821148), we get a palindrome (86933968).

It can be divided in two parts, 841128 and 20, that added together give a palindrome (841148).

The spelling of 84112820 in words is "eighty-four million, one hundred twelve thousand, eight hundred twenty".