1878631884 has 72 divisors (see below), whose sum is σ = 4894999200. Its totient is φ = 607219200.

The previous prime is 1878631871. The next prime is 1878631889. The reversal of 1878631884 is 4881368781.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1878631884.

It is not an unprimeable number, because it can be changed into a prime (1878631889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149892 + ... + 161940.

It is an arithmetic number, because the mean of its divisors is an integer number (67986100).

Almost surely, 2^1878631884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1878631884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2447499600).

1878631884 is an abundant number, since it is smaller than the sum of its proper divisors (3016367316).

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

1878631884 is a wasteful number, since it uses less digits than its factorization.

1878631884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12191 (or 12186 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 1878631884 is about 43343.1872847395. The cubic root of 1878631884 is about 1233.9017010888.

The spelling of 1878631884 in words is "one billion, eight hundred seventy-eight million, six hundred thirty-one thousand, eight hundred eighty-four".