83856440 has 16 divisors (see below), whose sum is σ = 188677080. Its totient is φ = 33542560.

The previous prime is 83856433. The next prime is 83856469. The reversal of 83856440 is 4465838.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 83856394 and 83856403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048166 + ... + 1048245.

Almost surely, 2^83856440 is an apocalyptic number.

It is an amenable number.

83856440 is an abundant number, since it is smaller than the sum of its proper divisors (104820640).

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

83856440 is a wasteful number, since it uses less digits than its factorization.

83856440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096422 (or 2096418 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 83856440 is about 9157.3162007217. The cubic root of 83856440 is about 437.7022781629.

The spelling of 83856440 in words is "eighty-three million, eight hundred fifty-six thousand, four hundred forty".