80785780 has 24 divisors (see below), whose sum is σ = 172853352. Its totient is φ = 31704192.

The previous prime is 80785769. The next prime is 80785787. The reversal of 80785780 is 8758708.

It can be written as a sum of positive squares in 4 ways, for example, as 19131876 + 61653904 = 4374^2 + 7852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80785787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37047 + ... + 39166.

It is an arithmetic number, because the mean of its divisors is an integer number (7202223).

Almost surely, 2^80785780 is an apocalyptic number.

It is an amenable number.

80785780 is an abundant number, since it is smaller than the sum of its proper divisors (92067572).

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

80785780 is a wasteful number, since it uses less digits than its factorization.

80785780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76275 (or 76273 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 80785780 is about 8988.0910097751. The cubic root of 80785780 is about 432.2931038445.

The spelling of 80785780 in words is "eighty million, seven hundred eighty-five thousand, seven hundred eighty".