80729760 has 96 divisors (see below), whose sum is σ = 256798080. Its totient is φ = 21316608.

The previous prime is 80729749. The next prime is 80729773. The reversal of 80729760 is 6792708.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51549 + ... + 53091.

It is an arithmetic number, because the mean of its divisors is an integer number (2674980).

Almost surely, 2^80729760 is an apocalyptic number.

80729760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80729760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128399040).

80729760 is an abundant number, since it is smaller than the sum of its proper divisors (176068320).

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

80729760 is a wasteful number, since it uses less digits than its factorization.

80729760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 80729760 is about 8984.9741235020. The cubic root of 80729760 is about 432.1931577916.

The spelling of 80729760 in words is "eighty million, seven hundred twenty-nine thousand, seven hundred sixty".