878819844 has 144 divisors (see below), whose sum is σ = 2513551488. Its totient is φ = 234026496.

The previous prime is 878819839. The next prime is 878819861. The reversal of 878819844 is 448918878.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2213454 + ... + 2213850.

Almost surely, 2^878819844 is an apocalyptic number.

878819844 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878819844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256775744).

878819844 is an abundant number, since it is smaller than the sum of its proper divisors (1634731644).

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

878819844 is a wasteful number, since it uses less digits than its factorization.

878819844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 501 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 57.

The square root of 878819844 is about 29644.8957495215. The cubic root of 878819844 is about 957.8553992491.

The spelling of 878819844 in words is "eight hundred seventy-eight million, eight hundred nineteen thousand, eight hundred forty-four".