3138731788 has 6 divisors (see below), whose sum is σ = 5492780636. Its totient is φ = 1569365892.

The previous prime is 3138731773. The next prime is 3138731789. The reversal of 3138731788 is 8871378313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3138731789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392341470 + ... + 392341477.

Almost surely, 2^3138731788 is an apocalyptic number.

It is an amenable number.

3138731788 is a deficient number, since it is larger than the sum of its proper divisors (2354048848).

3138731788 is a wasteful number, since it uses less digits than its factorization.

3138731788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784682951 (or 784682949 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 3138731788 is about 56024.3856548200. The cubic root of 3138731788 is about 1464.1471796799.

The spelling of 3138731788 in words is "three billion, one hundred thirty-eight million, seven hundred thirty-one thousand, seven hundred eighty-eight".