83845680 has 40 divisors (see below), whose sum is σ = 259922352. Its totient is φ = 22358784.

The previous prime is 83845639. The next prime is 83845681. The reversal of 83845680 is 8654838.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (83845681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174439 + ... + 174918.

Almost surely, 2^83845680 is an apocalyptic number.

83845680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83845680 is an abundant number, since it is smaller than the sum of its proper divisors (176076672).

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

83845680 is a wasteful number, since it uses less digits than its factorization.

83845680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349373 (or 349367 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 83845680 is about 9156.7286734947. The cubic root of 83845680 is about 437.6835561742.

The spelling of 83845680 in words is "eighty-three million, eight hundred forty-five thousand, six hundred eighty".