80718840 has 96 divisors (see below), whose sum is σ = 276166800. Its totient is φ = 20390400.

The previous prime is 80718811. The next prime is 80718851. The reversal of 80718840 is 4881708.

It is a super-2 number, since 2×80718840² = 13031062261891200, which contains 22 as substring.

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 = 80718795 and 80718804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 940 + ... + 12740.

Almost surely, 2^80718840 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 80718840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138083400).

80718840 is an abundant number, since it is smaller than the sum of its proper divisors (195447960).

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

80718840 is a wasteful number, since it uses less digits than its factorization.

80718840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11837 (or 11830 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 80718840 is about 8984.3664217350. The cubic root of 80718840 is about 432.1736698849.

The spelling of 80718840 in words is "eighty million, seven hundred eighteen thousand, eight hundred forty".