84537728 has 32 divisors (see below), whose sum is σ = 183728520. Its totient is φ = 38425600.

The previous prime is 84537727. The next prime is 84537763. The reversal of 84537728 is 82773548.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84537721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28613 + ... + 31428.

Almost surely, 2^84537728 is an apocalyptic number.

84537728 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

84537728 is an abundant number, since it is smaller than the sum of its proper divisors (99190792).

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

84537728 is a wasteful number, since it uses less digits than its factorization.

84537728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60066 (or 60054 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 84537728 is about 9194.4400590792. The cubic root of 84537728 is about 438.8844468018.

The spelling of 84537728 in words is "eighty-four million, five hundred thirty-seven thousand, seven hundred twenty-eight".