80440136 has 16 divisors (see below), whose sum is σ = 172371840. Its totient is φ = 34474320.

The previous prime is 80440123. The next prime is 80440159. The reversal of 80440136 is 63104408.

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 3 ways as a sum of consecutive naturals, for example, 718160 + ... + 718271.

It is an arithmetic number, because the mean of its divisors is an integer number (10773240).

Almost surely, 2^80440136 is an apocalyptic number.

It is an amenable number.

80440136 is an abundant number, since it is smaller than the sum of its proper divisors (91931704).

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

80440136 is a wasteful number, since it uses less digits than its factorization.

80440136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436444 (or 1436440 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 80440136 is about 8968.8425117180. The cubic root of 80440136 is about 431.6756968208.

The spelling of 80440136 in words is "eighty million, four hundred forty thousand, one hundred thirty-six".