80129736 has 96 divisors (see below), whose sum is σ = 230106240. Its totient is φ = 26111808.

The previous prime is 80129717. The next prime is 80129741. The reversal of 80129736 is 63792108.

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

It is a self number, because there is not a number n which added to its sum of digits gives 80129736.

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 23 ways as a sum of consecutive naturals, for example, 90930 + ... + 91806.

It is an arithmetic number, because the mean of its divisors is an integer number (2396940).

Almost surely, 2^80129736 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 80129736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115053120).

80129736 is an abundant number, since it is smaller than the sum of its proper divisors (149976504).

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

80129736 is a wasteful number, since it uses less digits than its factorization.

80129736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 80129736 is about 8951.5214349294. The cubic root of 80129736 is about 431.1197353250.

The spelling of 80129736 in words is "eighty million, one hundred twenty-nine thousand, seven hundred thirty-six".