3969636378 has 32 divisors (see below), whose sum is σ = 8320081536. Its totient is φ = 1260238848.

The previous prime is 3969636367. The next prime is 3969636379. The reversal of 3969636378 is 8736369693.

It is not an unprimeable number, because it can be changed into a prime (3969636379) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29575 + ... + 93882.

It is an arithmetic number, because the mean of its divisors is an integer number (260002548).

Almost surely, 2^3969636378 is an apocalyptic number.

3969636378 is an abundant number, since it is smaller than the sum of its proper divisors (4350445158).

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

3969636378 is a wasteful number, since it uses less digits than its factorization.

3969636378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123718.

The product of its digits is 26453952, while the sum is 60.

The square root of 3969636378 is about 63005.0504166134. The cubic root of 3969636378 is about 1583.3742418781.

The spelling of 3969636378 in words is "three billion, nine hundred sixty-nine million, six hundred thirty-six thousand, three hundred seventy-eight".