80728256 has 56 divisors (see below), whose sum is σ = 183952896. Its totient is φ = 34433280.

The previous prime is 80728253. The next prime is 80728259. The reversal of 80728256 is 65282708.

It is an interprime number because it is at equal distance from previous prime (80728253) and next prime (80728259).

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (80728253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164171 + ... + 164661.

Almost surely, 2^80728256 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 80728256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91976448).

80728256 is an abundant number, since it is smaller than the sum of its proper divisors (103224640).

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

80728256 is a wasteful number, since it uses less digits than its factorization.

80728256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 80728256 is about 8984.8904278238. The cubic root of 80728256 is about 432.1904738473.

The spelling of 80728256 in words is "eighty million, seven hundred twenty-eight thousand, two hundred fifty-six".