84170816 has 28 divisors (see below), whose sum is σ = 169865040. Its totient is φ = 41370240.

The previous prime is 84170813. The next prime is 84170851. The reversal of 84170816 is 61807148.

It is a super-2 number, since 2×84170816² = 14169452532211712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84170813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7370 + ... + 14921.

Almost surely, 2^84170816 is an apocalyptic number.

It is an amenable number.

84170816 is an abundant number, since it is smaller than the sum of its proper divisors (85694224).

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

84170816 is a wasteful number, since it uses less digits than its factorization.

84170816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22362 (or 22352 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 84170816 is about 9174.4654340185. The cubic root of 84170816 is about 438.2485748721.

The spelling of 84170816 in words is "eighty-four million, one hundred seventy thousand, eight hundred sixteen".