83891904 has 56 divisors (see below), whose sum is σ = 227399088. Its totient is φ = 27279360.

The previous prime is 83891893. The next prime is 83891909. The reversal of 83891904 is 40919838.

It is not an unprimeable number, because it can be changed into a prime (83891909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2544 + ... + 13200.

It is an arithmetic number, because the mean of its divisors is an integer number (4060698).

Almost surely, 2^83891904 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 83891904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113699544).

83891904 is an abundant number, since it is smaller than the sum of its proper divisors (143507184).

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

83891904 is a wasteful number, since it uses less digits than its factorization.

83891904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10713 (or 10703 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 83891904 is about 9159.2523712364. The cubic root of 83891904 is about 437.7639728317.

The spelling of 83891904 in words is "eighty-three million, eight hundred ninety-one thousand, nine hundred four".