80804778 has 16 divisors (see below), whose sum is σ = 162196320. Its totient is φ = 26837136.

The previous prime is 80804767. The next prime is 80804827. The reversal of 80804778 is 87740808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22648 + ... + 25971.

It is an arithmetic number, because the mean of its divisors is an integer number (10137270).

Almost surely, 2^80804778 is an apocalyptic number.

80804778 is an abundant number, since it is smaller than the sum of its proper divisors (81391542).

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

80804778 is a wasteful number, since it uses less digits than its factorization.

80804778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48901.

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 80804778 is about 8989.1477905305. The cubic root of 80804778 is about 432.3269879459.

The spelling of 80804778 in words is "eighty million, eight hundred four thousand, seven hundred seventy-eight".