80565290 has 32 divisors (see below), whose sum is σ = 157807440. Its totient is φ = 29435904.

The previous prime is 80565283. The next prime is 80565299. The reversal of 80565290 is 9256508.

It can be written as a sum of positive squares in 8 ways, for example, as 1301881 + 79263409 = 1141^2 + 8903^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80565290.

It is not an unprimeable number, because it can be changed into a prime (80565299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9416 + ... + 15804.

Almost surely, 2^80565290 is an apocalyptic number.

80565290 is a deficient number, since it is larger than the sum of its proper divisors (77242150).

80565290 is a wasteful number, since it uses less digits than its factorization.

80565290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 80565290 is about 8975.8169544616. The cubic root of 80565290 is about 431.8994571973.

The spelling of 80565290 in words is "eighty million, five hundred sixty-five thousand, two hundred ninety".