3978778793 has 16 divisors (see below), whose sum is σ = 4486164480. Its totient is φ = 3495968400.

The previous prime is 3978778789. The next prime is 3978778813.

3978778793 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 3978778793 - 2² = 3978778789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3978778723) 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 15 ways as a sum of consecutive naturals, for example, 279146 + ... + 293052.

It is an arithmetic number, because the mean of its divisors is an integer number (280385280).

Almost surely, 2^3978778793 is an apocalyptic number.

It is an amenable number.

3978778793 is a deficient number, since it is larger than the sum of its proper divisors (507385687).

3978778793 is a wasteful number, since it uses less digits than its factorization.

3978778793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14788.

The product of its digits is 112021056, while the sum is 68.

The square root of 3978778793 is about 63077.5617236431. The cubic root of 3978778793 is about 1584.5888590525.

The spelling of 3978778793 in words is "three billion, nine hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred ninety-three".