4138666940 has 12 divisors (see below), whose sum is σ = 8691200616. Its totient is φ = 1655466768.

The previous prime is 4138666933. The next prime is 4138666991. The reversal of 4138666940 is 496668314.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103466654 + ... + 103466693.

It is an arithmetic number, because the mean of its divisors is an integer number (724266718).

Almost surely, 2^4138666940 is an apocalyptic number.

It is an amenable number.

4138666940 is an abundant number, since it is smaller than the sum of its proper divisors (4552533676).

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

4138666940 is a wasteful number, since it uses less digits than its factorization.

4138666940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206933356 (or 206933354 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 4138666940 is about 64332.4718940598. The cubic root of 4138666940 is about 1605.5364116407.

The spelling of 4138666940 in words is "four billion, one hundred thirty-eight million, six hundred sixty-six thousand, nine hundred forty".