3081978938 has 16 divisors (see below), whose sum is σ = 4825083816. Its totient is φ = 1475036160.

The previous prime is 3081978937. The next prime is 3081978941. The reversal of 3081978938 is 8398791803.

It can be written as a sum of positive squares in 4 ways, for example, as 2299490209 + 782488729 = 47953^2 + 27973^2 .

It is not an unprimeable number, because it can be changed into a prime (3081978931) 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 in 7 ways as a sum of consecutive naturals, for example, 350231 + ... + 358922.

Almost surely, 2^3081978938 is an apocalyptic number.

3081978938 is a deficient number, since it is larger than the sum of its proper divisors (1743104878).

3081978938 is a wasteful number, since it uses less digits than its factorization.

3081978938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709249.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 3081978938 is about 55515.5738329345. The cubic root of 3081978938 is about 1455.2688123767.

The spelling of 3081978938 in words is "three billion, eighty-one million, nine hundred seventy-eight thousand, nine hundred thirty-eight".