80569820 has 12 divisors (see below), whose sum is σ = 169196664. Its totient is φ = 32227920.

The previous prime is 80569807. The next prime is 80569873. The reversal of 80569820 is 2896508.

It is a congruent number.

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, 2014226 + ... + 2014265.

It is an arithmetic number, because the mean of its divisors is an integer number (14099722).

Almost surely, 2^80569820 is an apocalyptic number.

It is an amenable number.

80569820 is an abundant number, since it is smaller than the sum of its proper divisors (88626844).

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

80569820 is a wasteful number, since it uses less digits than its factorization.

80569820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028500 (or 4028498 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 80569820 is about 8976.0692956327. The cubic root of 80569820 is about 431.9075519482.

The spelling of 80569820 in words is "eighty million, five hundred sixty-nine thousand, eight hundred twenty".