80820878 has 8 divisors (see below), whose sum is σ = 122045400. Its totient is φ = 40139080.

The previous prime is 80820869. The next prime is 80820911. The reversal of 80820878 is 87802808.

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

It is a Curzon number.

It is a congruent number.

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, 135308 + ... + 135903.

It is an arithmetic number, because the mean of its divisors is an integer number (15255675).

Almost surely, 2^80820878 is an apocalyptic number.

80820878 is a deficient number, since it is larger than the sum of its proper divisors (41224522).

80820878 is a wasteful number, since it uses less digits than its factorization.

80820878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271362.

The product of its (nonzero) digits is 57344, while the sum is 41.

The square root of 80820878 is about 8990.0432701962. The cubic root of 80820878 is about 432.3556991288.

The spelling of 80820878 in words is "eighty million, eight hundred twenty thousand, eight hundred seventy-eight".