1878638120 has 16 divisors (see below), whose sum is σ = 4226935860. Its totient is φ = 751455232.

The previous prime is 1878638093. The next prime is 1878638131. The reversal of 1878638120 is 218368781.

It can be written as a sum of positive squares in 2 ways, for example, as 1870216516 + 8421604 = 43246^2 + 2902^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23482937 + ... + 23483016.

Almost surely, 2^1878638120 is an apocalyptic number.

1878638120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1878638120 is an abundant number, since it is smaller than the sum of its proper divisors (2348297740).

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

1878638120 is a wasteful number, since it uses less digits than its factorization.

1878638120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46965964 (or 46965960 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1878638120 is about 43343.2592221674. The cubic root of 1878638120 is about 1233.9030663736.

The spelling of 1878638120 in words is "one billion, eight hundred seventy-eight million, six hundred thirty-eight thousand, one hundred twenty".