3138505887 has 32 divisors (see below), whose sum is σ = 4770754560. Its totient is φ = 1818321120.

The previous prime is 3138505883. The next prime is 3138505897. The reversal of 3138505887 is 7885058313.

It is a happy number.

It is not a de Polignac number, because 3138505887 - 2² = 3138505883 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3138505883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43164 + ... + 90222.

It is an arithmetic number, because the mean of its divisors is an integer number (149086080).

Almost surely, 2^3138505887 is an apocalyptic number.

3138505887 is a deficient number, since it is larger than the sum of its proper divisors (1632248673).

3138505887 is a wasteful number, since it uses less digits than its factorization.

3138505887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47163.

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 3138505887 is about 56022.3695232538. The cubic root of 3138505887 is about 1464.1120529398.

The spelling of 3138505887 in words is "three billion, one hundred thirty-eight million, five hundred five thousand, eight hundred eighty-seven".