3978908391148 has 12 divisors (see below), whose sum is σ = 6967406552400. Its totient is φ = 1988220804752.

The previous prime is 3978908391131. The next prime is 3978908391173. The reversal of 3978908391148 is 8411938098793.

It is a super-3 number, since 3×3978908391148³ (a number of 39 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308340448 + ... + 308353351.

It is an arithmetic number, because the mean of its divisors is an integer number (580617212700).

Almost surely, 2^{3978908391148} is an apocalyptic number.

It is an amenable number.

3978908391148 is a deficient number, since it is larger than the sum of its proper divisors (2988498161252).

3978908391148 is a wasteful number, since it uses less digits than its factorization.

3978908391148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616695416 (or 616695414 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 70.

The spelling of 3978908391148 in words is "three trillion, nine hundred seventy-eight billion, nine hundred eight million, three hundred ninety-one thousand, one hundred forty-eight".