84728664 has 24 divisors (see below), whose sum is σ = 229473660. Its totient is φ = 28242864.

The previous prime is 84728621. The next prime is 84728687. The reversal of 84728664 is 46682748.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 588322 + ... + 588465.

Almost surely, 2^84728664 is an apocalyptic number.

It is an amenable number.

84728664 is an abundant number, since it is smaller than the sum of its proper divisors (144744996).

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

84728664 is a wasteful number, since it uses less digits than its factorization.

84728664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176799 (or 1176792 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 84728664 is about 9204.8174343656. The cubic root of 84728664 is about 439.2146182440.

The spelling of 84728664 in words is "eighty-four million, seven hundred twenty-eight thousand, six hundred sixty-four".