3978247275 has 72 divisors (see below), whose sum is σ = 7280694720. Its totient is φ = 2075958720.

The previous prime is 3978247249. The next prime is 3978247283. The reversal of 3978247275 is 5727428793.

3978247275 is a `hidden beast` number, since 3 + 97 + 82 + 472 + 7 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-3978247275 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2456416 + ... + 2458034.

It is an arithmetic number, because the mean of its divisors is an integer number (101120760).

Almost surely, 2^3978247275 is an apocalyptic number.

3978247275 is a deficient number, since it is larger than the sum of its proper divisors (3302447445).

3978247275 is a wasteful number, since it uses less digits than its factorization.

3978247275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865 (or 1857 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The square root of 3978247275 is about 63073.3483731441. The cubic root of 3978247275 is about 1584.5182951054.

The spelling of 3978247275 in words is "three billion, nine hundred seventy-eight million, two hundred forty-seven thousand, two hundred seventy-five".