3138866786 has 32 divisors (see below), whose sum is σ = 5334329088. Its totient is φ = 1372749840.

The previous prime is 3138866681. The next prime is 3138866827. The reversal of 3138866786 is 6876688313.

It is a happy number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 38621 + ... + 88143.

It is an arithmetic number, because the mean of its divisors is an integer number (166697784).

Almost surely, 2^3138866786 is an apocalyptic number.

3138866786 is a deficient number, since it is larger than the sum of its proper divisors (2195462302).

3138866786 is a wasteful number, since it uses less digits than its factorization.

3138866786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49646.

The product of its digits is 6967296, while the sum is 56.

The square root of 3138866786 is about 56025.5904565048. The cubic root of 3138866786 is about 1464.1681705472.

The spelling of 3138866786 in words is "three billion, one hundred thirty-eight million, eight hundred sixty-six thousand, seven hundred eighty-six".