84745728 has 120 divisors (see below), whose sum is σ = 249914808. Its totient is φ = 27635712.

The previous prime is 84745693. The next prime is 84745741. The reversal of 84745728 is 82754748.

84745728 is a `hidden beast` number, since 8 + 4 + 74 + 572 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244051 + ... + 244397.

Almost surely, 2^84745728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84745728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124957404).

84745728 is an abundant number, since it is smaller than the sum of its proper divisors (165169080).

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

84745728 is a wasteful number, since it uses less digits than its factorization.

84745728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 405 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 84745728 is about 9205.7442936462. The cubic root of 84745728 is about 439.2441015963.

The spelling of 84745728 in words is "eighty-four million, seven hundred forty-five thousand, seven hundred twenty-eight".