80784045 has 12 divisors (see below), whose sum is σ = 140025756. Its totient is φ = 43084800.

The previous prime is 80784043. The next prime is 80784059. The reversal of 80784045 is 54048708.

It can be written as a sum of positive squares in 2 ways, for example, as 32592681 + 48191364 = 5709^2 + 6942^2 .

It is not a de Polignac number, because 80784045 - 2¹ = 80784043 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80784043) 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 11 ways as a sum of consecutive naturals, for example, 897556 + ... + 897645.

It is an arithmetic number, because the mean of its divisors is an integer number (11668813).

Almost surely, 2^80784045 is an apocalyptic number.

It is an amenable number.

80784045 is a deficient number, since it is larger than the sum of its proper divisors (59241711).

80784045 is a wasteful number, since it uses less digits than its factorization.

80784045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795212 (or 1795209 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 80784045 is about 8987.9944926552. The cubic root of 80784045 is about 432.2900091006.

The spelling of 80784045 in words is "eighty million, seven hundred eighty-four thousand, forty-five".