84105620 has 12 divisors (see below), whose sum is σ = 176621844. Its totient is φ = 33642240.

The previous prime is 84105617. The next prime is 84105631. The reversal of 84105620 is 2650148.

It can be written as a sum of positive squares in 2 ways, for example, as 59938564 + 24167056 = 7742^2 + 4916^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 84105620.

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 3 ways as a sum of consecutive naturals, for example, 2102621 + ... + 2102660.

It is an arithmetic number, because the mean of its divisors is an integer number (14718487).

Almost surely, 2^84105620 is an apocalyptic number.

It is an amenable number.

84105620 is an abundant number, since it is smaller than the sum of its proper divisors (92516224).

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

84105620 is a wasteful number, since it uses less digits than its factorization.

84105620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205290 (or 4205288 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 84105620 is about 9170.9116231703. The cubic root of 84105620 is about 438.1353945735.

Adding to 84105620 its reverse (2650148), we get a palindrome (86755768).

The spelling of 84105620 in words is "eighty-four million, one hundred five thousand, six hundred twenty".