878213828 has 24 divisors (see below), whose sum is σ = 1566696600. Its totient is φ = 430629120.

The previous prime is 878213813. The next prime is 878213851. The reversal of 878213828 is 828312878.

It can be written as a sum of positive squares in 4 ways, for example, as 24522304 + 853691524 = 4952^2 + 29218^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80000 + ... + 90312.

It is an arithmetic number, because the mean of its divisors is an integer number (65279025).

Almost surely, 2^878213828 is an apocalyptic number.

It is an amenable number.

878213828 is a deficient number, since it is larger than the sum of its proper divisors (688482772).

878213828 is a wasteful number, since it uses less digits than its factorization.

878213828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10727 (or 10725 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The square root of 878213828 is about 29634.6727331347. The cubic root of 878213828 is about 957.6351761925.

The spelling of 878213828 in words is "eight hundred seventy-eight million, two hundred thirteen thousand, eight hundred twenty-eight".