2878688887 has 4 divisors (see below), whose sum is σ = 2878913880. Its totient is φ = 2878463896.

The previous prime is 2878688873. The next prime is 2878688903. The reversal of 2878688887 is 7888868782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2878688887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878688287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92068 + ... + 119305.

It is an arithmetic number, because the mean of its divisors is an integer number (719728470).

Almost surely, 2^2878688887 is an apocalyptic number.

2878688887 is a deficient number, since it is larger than the sum of its proper divisors (224993).

2878688887 is a wasteful number, since it uses less digits than its factorization.

2878688887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224992.

The product of its digits is 154140672, while the sum is 70.

The square root of 2878688887 is about 53653.4144952584. The cubic root of 2878688887 is about 1422.5413867539.

The spelling of 2878688887 in words is "two billion, eight hundred seventy-eight million, six hundred eighty-eight thousand, eight hundred eighty-seven".