3978266331 has 16 divisors (see below), whose sum is σ = 5721470720. Its totient is φ = 2444268960.

The previous prime is 3978266321. The next prime is 3978266351. The reversal of 3978266331 is 1336628793.

It is not a de Polignac number, because 3978266331 - 2⁶ = 3978266267 is a prime.

It is a super-2 number, since 2×3978266331² = 31653206000736403122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3978266321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56221 + ... + 105438.

It is an arithmetic number, because the mean of its divisors is an integer number (357591920).

Almost surely, 2^3978266331 is an apocalyptic number.

3978266331 is a deficient number, since it is larger than the sum of its proper divisors (1743204389).

3978266331 is a wasteful number, since it uses less digits than its factorization.

3978266331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162306.

The product of its digits is 979776, while the sum is 48.

The square root of 3978266331 is about 63073.4994351828. The cubic root of 3978266331 is about 1584.5208250749.

The spelling of 3978266331 in words is "three billion, nine hundred seventy-eight million, two hundred sixty-six thousand, three hundred thirty-one".