80780287 has 16 divisors (see below), whose sum is σ = 96388672. Its totient is φ = 66251520.

The previous prime is 80780281. The next prime is 80780299. The reversal of 80780287 is 78208708.

It is a cyclic number.

It is not a de Polignac number, because 80780287 - 2¹¹ = 80778239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80780281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13243 + ... + 18355.

It is an arithmetic number, because the mean of its divisors is an integer number (6024292).

Almost surely, 2^80780287 is an apocalyptic number.

80780287 is a deficient number, since it is larger than the sum of its proper divisors (15608385).

80780287 is a wasteful number, since it uses less digits than its factorization.

80780287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 80780287 is about 8987.7854335759. The cubic root of 80780287 is about 432.2833057512.

The spelling of 80780287 in words is "eighty million, seven hundred eighty thousand, two hundred eighty-seven".