83840064 has 224 divisors, whose sum is σ = 284414976. Its totient is φ = 21166080.

The previous prime is 83840063. The next prime is 83840069. The reversal of 83840064 is 46004838.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (83840063) 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 31 ways as a sum of consecutive naturals, for example, 783499 + ... + 783605.

Almost surely, 2^83840064 is an apocalyptic number.

83840064 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83840064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142207488).

83840064 is an abundant number, since it is smaller than the sum of its proper divisors (200574912).

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

83840064 is a wasteful number, since it uses less digits than its factorization.

83840064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 83840064 is about 9156.4220086232. The cubic root of 83840064 is about 437.6737839127.

The spelling of 83840064 in words is "eighty-three million, eight hundred forty thousand, sixty-four".