3993256378 has 32 divisors (see below), whose sum is σ = 6397395984. Its totient is φ = 1862894592.

The previous prime is 3993256369. The next prime is 3993256417. The reversal of 3993256378 is 8736523993.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1830727369 + 2162529009 = 42787^2 + 46503^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4552876 + ... + 4553752.

Almost surely, 2^3993256378 is an apocalyptic number.

3993256378 is a deficient number, since it is larger than the sum of its proper divisors (2404139606).

3993256378 is a wasteful number, since it uses less digits than its factorization.

3993256378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906.

The product of its digits is 7348320, while the sum is 55.

The square root of 3993256378 is about 63192.2177012328. The cubic root of 3993256378 is about 1586.5084807952.

The spelling of 3993256378 in words is "three billion, nine hundred ninety-three million, two hundred fifty-six thousand, three hundred seventy-eight".