2857878 has 12 divisors (see below), whose sum is σ = 6192108. Its totient is φ = 952620.

The previous prime is 2857867. The next prime is 2857889. The reversal of 2857878 is 8787582.

It is a happy number.

2857878 is a `hidden beast` number, since 2 + 8 + 578 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (2857867) and next prime (2857889).

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 5 ways as a sum of consecutive naturals, for example, 79368 + ... + 79403.

It is an arithmetic number, because the mean of its divisors is an integer number (516009).

2^2857878 is an apocalyptic number.

2857878 is an abundant number, since it is smaller than the sum of its proper divisors (3334230).

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

2857878 is a wasteful number, since it uses less digits than its factorization.

2857878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158779 (or 158776 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 2857878 is about 1690.5259536606. The cubic root of 2857878 is about 141.9105103011.

The spelling of 2857878 in words is "two million, eight hundred fifty-seven thousand, eight hundred seventy-eight".