80810840 has 32 divisors (see below), whose sum is σ = 198354960. Its totient is φ = 29385600.

The previous prime is 80810839. The next prime is 80810861. The reversal of 80810840 is 4801808.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 91391 + ... + 92270.

Almost surely, 2^80810840 is an apocalyptic number.

It is an amenable number.

80810840 is an abundant number, since it is smaller than the sum of its proper divisors (117544120).

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

80810840 is a wasteful number, since it uses less digits than its factorization.

80810840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183683 (or 183679 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 80810840 is about 8989.4849685619. The cubic root of 80810840 is about 432.3377987781.

The spelling of 80810840 in words is "eighty million, eight hundred ten thousand, eight hundred forty".