3978824775 has 12 divisors (see below), whose sum is σ = 6578323752. Its totient is φ = 2122039840.

The previous prime is 3978824771. The next prime is 3978824791. The reversal of 3978824775 is 5774288793.

It is not a de Polignac number, because 3978824775 - 2² = 3978824771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978824771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26525424 + ... + 26525573.

It is an arithmetic number, because the mean of its divisors is an integer number (548193646).

Almost surely, 2^3978824775 is an apocalyptic number.

3978824775 is a deficient number, since it is larger than the sum of its proper divisors (2599498977).

3978824775 is a wasteful number, since it uses less digits than its factorization.

3978824775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53051010 (or 53051005 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 60.

The square root of 3978824775 is about 63077.9262103630. The cubic root of 3978824775 is about 1584.5949632943.

The spelling of 3978824775 in words is "three billion, nine hundred seventy-eight million, eight hundred twenty-four thousand, seven hundred seventy-five".