83809220 has 24 divisors (see below), whose sum is σ = 191999808. Its totient is φ = 30476000.

The previous prime is 83809211. The next prime is 83809237. The reversal of 83809220 is 2290838.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190256 + ... + 190695.

It is an arithmetic number, because the mean of its divisors is an integer number (7999992).

Almost surely, 2^83809220 is an apocalyptic number.

It is an amenable number.

83809220 is an abundant number, since it is smaller than the sum of its proper divisors (108190588).

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

83809220 is a wasteful number, since it uses less digits than its factorization.

83809220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380971 (or 380969 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 83809220 is about 9154.7375713343. The cubic root of 83809220 is about 437.6201052562.

The spelling of 83809220 in words is "eighty-three million, eight hundred nine thousand, two hundred twenty".