80684780 has 48 divisors (see below), whose sum is σ = 186260256. Its totient is φ = 29114880.

The previous prime is 80684777. The next prime is 80684803. The reversal of 80684780 is 8748608.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28802 + ... + 31478.

It is an arithmetic number, because the mean of its divisors is an integer number (3880422).

Almost surely, 2^80684780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80684780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93130128).

80684780 is an abundant number, since it is smaller than the sum of its proper divisors (105575476).

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

80684780 is a wasteful number, since it uses less digits than its factorization.

80684780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834 (or 2832 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 80684780 is about 8982.4707068824. The cubic root of 80684780 is about 432.1128748831.

The spelling of 80684780 in words is "eighty million, six hundred eighty-four thousand, seven hundred eighty".