80820812 has 12 divisors (see below), whose sum is σ = 141603840. Its totient is φ = 40362576.

The previous prime is 80820809. The next prime is 80820829. The reversal of 80820812 is 21802808.

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, 8012 + ... + 15027.

It is an arithmetic number, because the mean of its divisors is an integer number (11800320).

Almost surely, 2^80820812 is an apocalyptic number.

It is an amenable number.

80820812 is a deficient number, since it is larger than the sum of its proper divisors (60783028).

80820812 is a wasteful number, since it uses less digits than its factorization.

80820812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23920 (or 23918 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 80820812 is about 8990.0395994678. The cubic root of 80820812 is about 432.3555814386.

The spelling of 80820812 in words is "eighty million, eight hundred twenty thousand, eight hundred twelve".