3978250864 has 40 divisors (see below), whose sum is σ = 8839121760. Its totient is φ = 1699131648.

The previous prime is 3978250819. The next prime is 3978250873. The reversal of 3978250864 is 4680528793.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27799 + ... + 93430.

It is an arithmetic number, because the mean of its divisors is an integer number (220978044).

Almost surely, 2^3978250864 is an apocalyptic number.

It is an amenable number.

3978250864 is an abundant number, since it is smaller than the sum of its proper divisors (4860870896).

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

3978250864 is a wasteful number, since it uses less digits than its factorization.

3978250864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121537 (or 121531 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The square root of 3978250864 is about 63073.3768241403. The cubic root of 3978250864 is about 1584.5187715995.

The spelling of 3978250864 in words is "three billion, nine hundred seventy-eight million, two hundred fifty thousand, eight hundred sixty-four".