80305128 has 128 divisors (see below), whose sum is σ = 235008000. Its totient is φ = 25375680.

The previous prime is 80305103. The next prime is 80305139. The reversal of 80305128 is 82150308.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448543 + ... + 448721.

It is an arithmetic number, because the mean of its divisors is an integer number (1836000).

Almost surely, 2^80305128 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 80305128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117504000).

80305128 is an abundant number, since it is smaller than the sum of its proper divisors (154702872).

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

80305128 is a wasteful number, since it uses less digits than its factorization.

80305128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 80305128 is about 8961.3128502469. The cubic root of 80305128 is about 431.4340582944.

The spelling of 80305128 in words is "eighty million, three hundred five thousand, one hundred twenty-eight".