80520920 has 16 divisors (see below), whose sum is σ = 181172160. Its totient is φ = 32208352.

The previous prime is 80520889. The next prime is 80520929. The reversal of 80520920 is 2902508.

It is a self number, because there is not a number n which added to its sum of digits gives 80520920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80520929) 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 3 ways as a sum of consecutive naturals, for example, 1006472 + ... + 1006551.

It is an arithmetic number, because the mean of its divisors is an integer number (11323260).

Almost surely, 2^80520920 is an apocalyptic number.

It is an amenable number.

80520920 is an abundant number, since it is smaller than the sum of its proper divisors (100651240).

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

80520920 is a wasteful number, since it uses less digits than its factorization.

80520920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013034 (or 2013030 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 80520920 is about 8973.3449727512. The cubic root of 80520920 is about 431.8201554783.

The spelling of 80520920 in words is "eighty million, five hundred twenty thousand, nine hundred twenty".