3933645378 has 32 divisors (see below), whose sum is σ = 8502665472. Its totient is φ = 1206038400.

The previous prime is 3933645361. The next prime is 3933645379. The reversal of 3933645378 is 8735463393.

3933645378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3933645378.

It is not an unprimeable number, because it can be changed into a prime (3933645379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67818 + ... + 111653.

It is an arithmetic number, because the mean of its divisors is an integer number (265708296).

Almost surely, 2^3933645378 is an apocalyptic number.

3933645378 is an abundant number, since it is smaller than the sum of its proper divisors (4569020094).

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

3933645378 is a wasteful number, since it uses less digits than its factorization.

3933645378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179770.

The product of its digits is 4898880, while the sum is 51.

The square root of 3933645378 is about 62718.7801061213. The cubic root of 3933645378 is about 1578.5744469719.

The spelling of 3933645378 in words is "three billion, nine hundred thirty-three million, six hundred forty-five thousand, three hundred seventy-eight".