83681788 has 12 divisors (see below), whose sum is σ = 146694240. Its totient is φ = 41769152.

The previous prime is 83681783. The next prime is 83681789. The reversal of 83681788 is 88718638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83681783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15268 + ... + 20011.

It is an arithmetic number, because the mean of its divisors is an integer number (12224520).

Almost surely, 2^83681788 is an apocalyptic number.

It is an amenable number.

83681788 is a deficient number, since it is larger than the sum of its proper divisors (63012452).

83681788 is a wasteful number, since it uses less digits than its factorization.

83681788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35876 (or 35874 counting only the distinct ones).

The product of its digits is 516096, while the sum is 49.

The square root of 83681788 is about 9147.7750300278. The cubic root of 83681788 is about 437.3981921475.

The spelling of 83681788 in words is "eighty-three million, six hundred eighty-one thousand, seven hundred eighty-eight".