878008778 has 4 divisors (see below), whose sum is σ = 1317013170. Its totient is φ = 439004388.

The previous prime is 878008717. The next prime is 878008799. The reversal of 878008778 is 877800878.

878008778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877800878 = 2 ⋅438900439.

It can be written as a sum of positive squares in only one way, i.e., 462379009 + 415629769 = 21503^2 + 20387^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219502193 + ... + 219502196.

Almost surely, 2^878008778 is an apocalyptic number.

878008778 is a deficient number, since it is larger than the sum of its proper divisors (439004392).

878008778 is a wasteful number, since it uses less digits than its factorization.

878008778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439004391.

The product of its (nonzero) digits is 1404928, while the sum is 53.

The square root of 878008778 is about 29631.2129012634. The cubic root of 878008778 is about 957.5606391526.

The spelling of 878008778 in words is "eight hundred seventy-eight million, eight thousand, seven hundred seventy-eight".