80644290 has 16 divisors (see below), whose sum is σ = 193546368. Its totient is φ = 21505136.

The previous prime is 80644271. The next prime is 80644297. The reversal of 80644290 is 9244608.

It is not an unprimeable number, because it can be changed into a prime (80644297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344042 + ... + 1344101.

It is an arithmetic number, because the mean of its divisors is an integer number (12096648).

Almost surely, 2^80644290 is an apocalyptic number.

80644290 is an abundant number, since it is smaller than the sum of its proper divisors (112902078).

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

80644290 is a wasteful number, since it uses less digits than its factorization.

80644290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688153.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 80644290 is about 8980.2165898156. The cubic root of 80644290 is about 432.0405804643.

Adding to 80644290 its reverse (9244608), we get a palindrome (89888898).

The spelling of 80644290 in words is "eighty million, six hundred forty-four thousand, two hundred ninety".