80720218 has 8 divisors (see below), whose sum is σ = 124986240. Its totient is φ = 39058140.

The previous prime is 80720209. The next prime is 80720257. The reversal of 80720218 is 81202708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650908 + ... + 651031.

It is an arithmetic number, because the mean of its divisors is an integer number (15623280).

Almost surely, 2^80720218 is an apocalyptic number.

80720218 is a deficient number, since it is larger than the sum of its proper divisors (44266022).

80720218 is a wasteful number, since it uses less digits than its factorization.

80720218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301972.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 80720218 is about 8984.4431101766. The cubic root of 80720218 is about 432.1761291700.

It can be divided in two parts, 807 and 20218, that added together give a square (21025 = 145²).

The spelling of 80720218 in words is "eighty million, seven hundred twenty thousand, two hundred eighteen".