80042840 has 32 divisors (see below), whose sum is σ = 184967280. Its totient is φ = 31151232.

The previous prime is 80042791. The next prime is 80042843. The reversal of 80042840 is 4824008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80042843) by changing a digit.

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, 25562 + ... + 28521.

Almost surely, 2^80042840 is an apocalyptic number.

It is an amenable number.

80042840 is an abundant number, since it is smaller than the sum of its proper divisors (104924440).

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

80042840 is a wasteful number, since it uses less digits than its factorization.

80042840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54131 (or 54127 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 80042840 is about 8946.6664182812. Note that the first 3 decimals coincide. The cubic root of 80042840 is about 430.9638375999.

Adding to 80042840 its reverse (4824008), we get a palindrome (84866848).

The spelling of 80042840 in words is "eighty million, forty-two thousand, eight hundred forty".