80391736 has 32 divisors (see below), whose sum is σ = 159350400. Its totient is φ = 37916640.

The previous prime is 80391733. The next prime is 80391749. The reversal of 80391736 is 63719308.

It is a junction number, because it is equal to n+sod(n) for n = 80391695 and 80391704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80391733) 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, 38971 + ... + 40981.

It is an arithmetic number, because the mean of its divisors is an integer number (4979700).

Almost surely, 2^80391736 is an apocalyptic number.

It is an amenable number.

80391736 is a deficient number, since it is larger than the sum of its proper divisors (78958664).

80391736 is a wasteful number, since it uses less digits than its factorization.

80391736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299 (or 2295 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 80391736 is about 8966.1438757138. The cubic root of 80391736 is about 431.5891011794.

The spelling of 80391736 in words is "eighty million, three hundred ninety-one thousand, seven hundred thirty-six".