128030039 has 4 divisors (see below), whose sum is σ = 128092800. Its totient is φ = 127967280.

The previous prime is 128029991. The next prime is 128030051. The reversal of 128030039 is 930030821.

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 128030039 - 2¹² = 128025943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128030069) 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, 28214 + ... + 32435.

It is an arithmetic number, because the mean of its divisors is an integer number (32023200).

Almost surely, 2^128030039 is an apocalyptic number.

128030039 is a deficient number, since it is larger than the sum of its proper divisors (62761).

128030039 is an equidigital number, since it uses as much as digits as its factorization.

128030039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62760.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 128030039 is about 11315.0359698942. The cubic root of 128030039 is about 504.0078405915.

The spelling of 128030039 in words is "one hundred twenty-eight million, thirty thousand, thirty-nine".