4138689042 has 24 divisors (see below), whose sum is σ = 8980315344. Its totient is φ = 1377539064.

The previous prime is 4138689031. The next prime is 4138689043. The reversal of 4138689042 is 2409868314.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4138689043) 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 11 ways as a sum of consecutive naturals, for example, 156028 + ... + 180615.

It is an arithmetic number, because the mean of its divisors is an integer number (374179806).

Almost surely, 2^4138689042 is an apocalyptic number.

4138689042 is an abundant number, since it is smaller than the sum of its proper divisors (4841626302).

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

4138689042 is a wasteful number, since it uses less digits than its factorization.

4138689042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337334 (or 337331 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 4138689042 is about 64332.6436733327. The cubic root of 4138689042 is about 1605.5392696867.

The spelling of 4138689042 in words is "four billion, one hundred thirty-eight million, six hundred eighty-nine thousand, forty-two".