84147904 has 28 divisors (see below), whose sum is σ = 170869864. Its totient is φ = 41094144.

The previous prime is 84147901. The next prime is 84147911. The reversal of 84147904 is 40974148.

It is not an unprimeable number, because it can be changed into a prime (84147901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12537 + ... + 18040.

Almost surely, 2^84147904 is an apocalyptic number.

It is an amenable number.

84147904 is an abundant number, since it is smaller than the sum of its proper divisors (86721960).

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

84147904 is a wasteful number, since it uses less digits than its factorization.

84147904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30632 (or 30622 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 84147904 is about 9173.2166659248. The cubic root of 84147904 is about 438.2088062878.

The spelling of 84147904 in words is "eighty-four million, one hundred forty-seven thousand, nine hundred four".