80012840 has 16 divisors (see below), whose sum is σ = 180028980. Its totient is φ = 32005120.

The previous prime is 80012839. The next prime is 80012887. The reversal of 80012840 is 4821008.

It can be written as a sum of positive squares in 2 ways, for example, as 70190884 + 9821956 = 8378^2 + 3134^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1000121 + ... + 1000200.

Almost surely, 2^80012840 is an apocalyptic number.

It is an amenable number.

80012840 is an abundant number, since it is smaller than the sum of its proper divisors (100016140).

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

80012840 is a wasteful number, since it uses less digits than its factorization.

80012840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000332 (or 2000328 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 80012840 is about 8944.9896590214. The cubic root of 80012840 is about 430.9099892244.

Adding to 80012840 its reverse (4821008), we get a palindrome (84833848).

The spelling of 80012840 in words is "eighty million, twelve thousand, eight hundred forty".