83390020 has 48 divisors (see below), whose sum is σ = 200874240. Its totient is φ = 28485504.

The previous prime is 83390011. The next prime is 83390033. The reversal of 83390020 is 2009338.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 43441 + ... + 45319.

It is an arithmetic number, because the mean of its divisors is an integer number (4184880).

Almost surely, 2^83390020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83390020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100437120).

83390020 is an abundant number, since it is smaller than the sum of its proper divisors (117484220).

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

83390020 is a wasteful number, since it uses less digits than its factorization.

83390020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212 (or 2210 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 83390020 is about 9131.8136205247. The cubic root of 83390020 is about 436.8892506487.

Adding to 83390020 its reverse (2009338), we get a palindrome (85399358).

The spelling of 83390020 in words is "eighty-three million, three hundred ninety thousand, twenty".