3856601638 has 16 divisors (see below), whose sum is σ = 5912331264. Its totient is φ = 1885885000.

The previous prime is 3856601579. The next prime is 3856601653. The reversal of 3856601638 is 8361066583.

It is a happy number.

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, 119763 + ... + 148513.

It is an arithmetic number, because the mean of its divisors is an integer number (369520704).

Almost surely, 2^3856601638 is an apocalyptic number.

3856601638 is a deficient number, since it is larger than the sum of its proper divisors (2055729626).

3856601638 is a wasteful number, since it uses less digits than its factorization.

3856601638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30227.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 3856601638 is about 62101.5429598975. The cubic root of 3856601638 is about 1568.2005209486.

The spelling of 3856601638 in words is "three billion, eight hundred fifty-six million, six hundred one thousand, six hundred thirty-eight".