4047857138 has 16 divisors (see below), whose sum is σ = 6549897816. Its totient is φ = 1865084160.

The previous prime is 4047857137. The next prime is 4047857141. The reversal of 4047857138 is 8317587404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2541873889 + 1505983249 = 50417^2 + 38807^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4047857092 and 4047857101.

It is not an unprimeable number, because it can be changed into a prime (4047857137) 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 7 ways as a sum of consecutive naturals, for example, 115853 + ... + 146688.

Almost surely, 2^4047857138 is an apocalyptic number.

4047857138 is a deficient number, since it is larger than the sum of its proper divisors (2502040678).

4047857138 is a wasteful number, since it uses less digits than its factorization.

4047857138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263149.

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 4047857138 is about 63622.7721653183. The cubic root of 4047857138 is about 1593.7066769349.

The spelling of 4047857138 in words is "four billion, forty-seven million, eight hundred fifty-seven thousand, one hundred thirty-eight".