80681328 has 240 divisors, whose sum is σ = 285981696. Its totient is φ = 20666880.

The previous prime is 80681311. The next prime is 80681339. The reversal of 80681328 is 82318608.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80681292 and 80681301.

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 47 ways as a sum of consecutive naturals, for example, 615823 + ... + 615953.

Almost surely, 2^80681328 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 80681328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142990848).

80681328 is an abundant number, since it is smaller than the sum of its proper divisors (205300368).

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

80681328 is a wasteful number, since it uses less digits than its factorization.

80681328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 80681328 is about 8982.2785527949. The cubic root of 80681328 is about 432.1067123210.

The spelling of 80681328 in words is "eighty million, six hundred eighty-one thousand, three hundred twenty-eight".