83856872 has 24 divisors (see below), whose sum is σ = 172826850. Its totient is φ = 38116320.

The previous prime is 83856859. The next prime is 83856889. The reversal of 83856872 is 27865838.

It can be written as a sum of positive squares in only one way, i.e., 70997476 + 12859396 = 8426^2 + 3586^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 42347 + ... + 44282.

Almost surely, 2^83856872 is an apocalyptic number.

It is an amenable number.

83856872 is an abundant number, since it is smaller than the sum of its proper divisors (88969978).

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

83856872 is a wasteful number, since it uses less digits than its factorization.

83856872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86657 (or 86642 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 83856872 is about 9157.3397883883. The cubic root of 83856872 is about 437.7030297930.

The spelling of 83856872 in words is "eighty-three million, eight hundred fifty-six thousand, eight hundred seventy-two".