83439900 has 108 divisors (see below), whose sum is σ = 264925752. Its totient is φ = 21962880.

The previous prime is 83439877. The next prime is 83439907. The reversal of 83439900 is 993438.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83439907) 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 35 ways as a sum of consecutive naturals, for example, 74142 + ... + 75258.

Almost surely, 2^83439900 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 83439900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132462876).

83439900 is an abundant number, since it is smaller than the sum of its proper divisors (181485852).

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

83439900 is a wasteful number, since it uses less digits than its factorization.

83439900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 83439900 is about 9134.5443236102. The cubic root of 83439900 is about 436.9763421747.

The spelling of 83439900 in words is "eighty-three million, four hundred thirty-nine thousand, nine hundred".