80136784 has 80 divisors (see below), whose sum is σ = 199487232. Its totient is φ = 30311424.

The previous prime is 80136779. The next prime is 80136799. The reversal of 80136784 is 48763108.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 32292 + ... + 34684.

Almost surely, 2^80136784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80136784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99743616).

80136784 is an abundant number, since it is smaller than the sum of its proper divisors (119350448).

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

80136784 is a wasteful number, since it uses less digits than its factorization.

80136784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 80136784 is about 8951.9151023678. The cubic root of 80136784 is about 431.1323750056.

The spelling of 80136784 in words is "eighty million, one hundred thirty-six thousand, seven hundred eighty-four".