1887690138 has 8 divisors (see below), whose sum is σ = 3775380288. Its totient is φ = 629230044.

The previous prime is 1887690107. The next prime is 1887690151. The reversal of 1887690138 is 8310967881.

1887690138 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

1887690138 is an admirable number.

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, 157307506 + ... + 157307517.

It is an arithmetic number, because the mean of its divisors is an integer number (471922536).

Almost surely, 2^1887690138 is an apocalyptic number.

1887690138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1887690138 is a wasteful number, since it uses less digits than its factorization.

1887690138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314615028.

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 1887690138 is about 43447.5561798359. The cubic root of 1887690138 is about 1235.8817020556.

The spelling of 1887690138 in words is "one billion, eight hundred eighty-seven million, six hundred ninety thousand, one hundred thirty-eight".