80720012 has 18 divisors (see below), whose sum is σ = 150060372. Its totient is φ = 37985344.

The previous prime is 80720011. The next prime is 80720023. The reversal of 80720012 is 21002708.

It is not an unprimeable number, because it can be changed into a prime (80720011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33758 + ... + 36069.

Almost surely, 2^80720012 is an apocalyptic number.

It is an amenable number.

80720012 is a deficient number, since it is larger than the sum of its proper divisors (69340360).

80720012 is a wasteful number, since it uses less digits than its factorization.

80720012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69865 (or 69846 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 80720012 is about 8984.4316459084. The cubic root of 80720012 is about 432.1757615283.

The spelling of 80720012 in words is "eighty million, seven hundred twenty thousand, twelve".