80720318 has 16 divisors (see below), whose sum is σ = 146517984. Its totient is φ = 32559360.

The previous prime is 80720309. The next prime is 80720323. The reversal of 80720318 is 81302708.

It is a super-2 number, since 2×80720318² = 13031539476042248, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 169343 + ... + 169818.

It is an arithmetic number, because the mean of its divisors is an integer number (9157374).

Almost surely, 2^80720318 is an apocalyptic number.

80720318 is a deficient number, since it is larger than the sum of its proper divisors (65797666).

80720318 is a wasteful number, since it uses less digits than its factorization.

80720318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339187.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 80720318 is about 8984.4486753501. The cubic root of 80720318 is about 432.1763076367.

The spelling of 80720318 in words is "eighty million, seven hundred twenty thousand, three hundred eighteen".