83686212 has 18 divisors (see below), whose sum is σ = 211540238. Its totient is φ = 27895392.

The previous prime is 83686177. The next prime is 83686243. The reversal of 83686212 is 21268638.

It can be written as a sum of positive squares in only one way, i.e., 76842756 + 6843456 = 8766^2 + 2616^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2324617 = 83686212 / (8 + 3 + 6 + 8 + 6 + 2 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1162273 + ... + 1162344.

Almost surely, 2^83686212 is an apocalyptic number.

It is an amenable number.

83686212 is an abundant number, since it is smaller than the sum of its proper divisors (127854026).

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

83686212 is a wasteful number, since it uses less digits than its factorization.

83686212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324627 (or 2324622 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 83686212 is about 9148.0168342652. The cubic root of 83686212 is about 437.4058999796.

The spelling of 83686212 in words is "eighty-three million, six hundred eighty-six thousand, two hundred twelve".