84228178 has 32 divisors (see below), whose sum is σ = 138608640. Its totient is φ = 38238480.

The previous prime is 84228173. The next prime is 84228181. The reversal of 84228178 is 87182248.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 84228178.

It is not an unprimeable number, because it can be changed into a prime (84228173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149325 + ... + 149887.

It is an arithmetic number, because the mean of its divisors is an integer number (4331520).

Almost surely, 2^84228178 is an apocalyptic number.

84228178 is a deficient number, since it is larger than the sum of its proper divisors (54380462).

84228178 is a wasteful number, since it uses less digits than its factorization.

84228178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742.

The product of its digits is 57344, while the sum is 40.

The square root of 84228178 is about 9177.5910782732. The cubic root of 84228178 is about 438.3481070197.

The spelling of 84228178 in words is "eighty-four million, two hundred twenty-eight thousand, one hundred seventy-eight".