878213855 has 8 divisors (see below), whose sum is σ = 1058460000. Its totient is φ = 699502176.

The previous prime is 878213851. The next prime is 878213857. The reversal of 878213855 is 558312878.

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

It is a cyclic number.

It is not a de Polignac number, because 878213855 - 2² = 878213851 is a prime.

It is a super-2 number, since 2×878213855² = 1542519150227922050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878213851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382355 + ... + 384644.

It is an arithmetic number, because the mean of its divisors is an integer number (132307500).

Almost surely, 2^878213855 is an apocalyptic number.

878213855 is a deficient number, since it is larger than the sum of its proper divisors (180246145).

878213855 is a wasteful number, since it uses less digits than its factorization.

878213855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767233.

The product of its digits is 537600, while the sum is 47.

The square root of 878213855 is about 29634.6731886822. The cubic root of 878213855 is about 957.6351860064.

The spelling of 878213855 in words is "eight hundred seventy-eight million, two hundred thirteen thousand, eight hundred fifty-five".