4006681138 has 4 divisors (see below), whose sum is σ = 6010021710. Its totient is φ = 2003340568.

The previous prime is 4006681103. The next prime is 4006681141. The reversal of 4006681138 is 8311866004.

4006681138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2446984089 + 1559697049 = 49467^2 + 39493^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4006681097 and 4006681106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001670283 + ... + 1001670286.

Almost surely, 2^4006681138 is an apocalyptic number.

4006681138 is a deficient number, since it is larger than the sum of its proper divisors (2003340572).

4006681138 is a wasteful number, since it uses less digits than its factorization.

4006681138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003340571.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 4006681138 is about 63298.3501996695. The cubic root of 4006681138 is about 1588.2843641472.

The spelling of 4006681138 in words is "four billion, six million, six hundred eighty-one thousand, one hundred thirty-eight".