3978575394 has 16 divisors (see below), whose sum is σ = 8005969632. Its totient is φ = 1318055328.

The previous prime is 3978575389. The next prime is 3978575411. The reversal of 3978575394 is 4935758793.

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, 2033059 + ... + 2035014.

It is an arithmetic number, because the mean of its divisors is an integer number (500373102).

Almost surely, 2^3978575394 is an apocalyptic number.

3978575394 is an abundant number, since it is smaller than the sum of its proper divisors (4027394238).

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

3978575394 is a wasteful number, since it uses less digits than its factorization.

3978575394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068241.

The product of its digits is 28576800, while the sum is 60.

The square root of 3978575394 is about 63075.9494102150. The cubic root of 3978575394 is about 1584.5618566900.

The spelling of 3978575394 in words is "three billion, nine hundred seventy-eight million, five hundred seventy-five thousand, three hundred ninety-four".