3978985146 has 16 divisors (see below), whose sum is σ = 8076746784. Its totient is φ = 1306532304.

The previous prime is 3978985121. The next prime is 3978985183. The reversal of 3978985146 is 6415898793.

It is a self number, because there is not a number n which added to its sum of digits gives 3978985146.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4948585 + ... + 4949388.

It is an arithmetic number, because the mean of its divisors is an integer number (504796674).

Almost surely, 2^3978985146 is an apocalyptic number.

3978985146 is an abundant number, since it is smaller than the sum of its proper divisors (4097761638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3978985146 is a wasteful number, since it uses less digits than its factorization.

3978985146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9898045.

The product of its digits is 13063680, while the sum is 60.

The square root of 3978985146 is about 63079.1974108739. The cubic root of 3978985146 is about 1584.6162526347.

The spelling of 3978985146 in words is "three billion, nine hundred seventy-eight million, nine hundred eighty-five thousand, one hundred forty-six".