83405220 has 24 divisors (see below), whose sum is σ = 233534784. Its totient is φ = 22241376.

The previous prime is 83405219. The next prime is 83405227. The reversal of 83405220 is 2250438.

It is not an unprimeable number, because it can be changed into a prime (83405227) 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, 694984 + ... + 695103.

It is an arithmetic number, because the mean of its divisors is an integer number (9730616).

Almost surely, 2^83405220 is an apocalyptic number.

It is an amenable number.

83405220 is an abundant number, since it is smaller than the sum of its proper divisors (150129564).

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

83405220 is a wasteful number, since it uses less digits than its factorization.

83405220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390099 (or 1390097 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 83405220 is about 9132.6458378720. The cubic root of 83405220 is about 436.9157938456.

Adding to 83405220 its reverse (2250438), we get a palindrome (85655658).

The spelling of 83405220 in words is "eighty-three million, four hundred five thousand, two hundred twenty".