80731680 has 96 divisors (see below), whose sum is σ = 257644800. Its totient is φ = 21245952.

The previous prime is 80731639. The next prime is 80731681. The reversal of 80731680 is 8613708.

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

It is a super-3 number, since 3×80731680³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (80731681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36856 + ... + 38984.

It is an arithmetic number, because the mean of its divisors is an integer number (2683800).

Almost surely, 2^80731680 is an apocalyptic number.

80731680 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 80731680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128822400).

80731680 is an abundant number, since it is smaller than the sum of its proper divisors (176913120).

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

80731680 is a wasteful number, since it uses less digits than its factorization.

80731680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226 (or 2218 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 80731680 is about 8985.0809679156. The cubic root of 80731680 is about 432.1965840551.

The spelling of 80731680 in words is "eighty million, seven hundred thirty-one thousand, six hundred eighty".