4128008939 has 4 divisors (see below), whose sum is σ = 4128405120. Its totient is φ = 4127612760.

The previous prime is 4128008923. The next prime is 4128008959. The reversal of 4128008939 is 9398008214.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4128008939 - 2⁴ = 4128008923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4128008939.

It is not an unprimeable number, because it can be changed into a prime (4128008909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182027 + ... + 203444.

It is an arithmetic number, because the mean of its divisors is an integer number (1032101280).

Almost surely, 2^4128008939 is an apocalyptic number.

4128008939 is a deficient number, since it is larger than the sum of its proper divisors (396181).

4128008939 is a wasteful number, since it uses less digits than its factorization.

4128008939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396180.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 4128008939 is about 64249.5831815273. The cubic root of 4128008939 is about 1604.1570207319.

The spelling of 4128008939 in words is "four billion, one hundred twenty-eight million, eight thousand, nine hundred thirty-nine".