80731144 has 32 divisors (see below), whose sum is σ = 163742040. Its totient is φ = 37094400.

The previous prime is 80731109. The next prime is 80731159. The reversal of 80731144 is 44113708.

It can be written as a sum of positive squares in 4 ways, for example, as 73102500 + 7628644 = 8550^2 + 2762^2 .

It is a super-2 number, since 2×80731144² = 13035035223097472, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23454 + ... + 26674.

Almost surely, 2^80731144 is an apocalyptic number.

It is an amenable number.

80731144 is an abundant number, since it is smaller than the sum of its proper divisors (83010896).

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

80731144 is a wasteful number, since it uses less digits than its factorization.

80731144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481 (or 3477 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 80731144 is about 8985.0511406447. The cubic root of 80731144 is about 432.1956275620.

The spelling of 80731144 in words is "eighty million, seven hundred thirty-one thousand, one hundred forty-four".