80387778 has 8 divisors (see below), whose sum is σ = 160775568. Its totient is φ = 26795924.

The previous prime is 80387771. The next prime is 80387779. The reversal of 80387778 is 87778308.

It is a sphenic number, since it is the product of 3 distinct primes.

80387778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (80387771) 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 3 ways as a sum of consecutive naturals, for example, 6698976 + ... + 6698987.

It is an arithmetic number, because the mean of its divisors is an integer number (20096946).

Almost surely, 2^80387778 is an apocalyptic number.

80387778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

80387778 is a wasteful number, since it uses less digits than its factorization.

80387778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13397968.

The product of its (nonzero) digits is 526848, while the sum is 48.

The square root of 80387778 is about 8965.9231538085. The cubic root of 80387778 is about 431.5820181226.

The spelling of 80387778 in words is "eighty million, three hundred eighty-seven thousand, seven hundred seventy-eight".