128790039 has 16 divisors (see below), whose sum is σ = 197123328. Its totient is φ = 73267392.

The previous prime is 128790029. The next prime is 128790043. The reversal of 128790039 is 930097821.

It is not a de Polignac number, because 128790039 - 2⁷ = 128789911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128789979 and 128790006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128790019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8742 + ... + 18275.

It is an arithmetic number, because the mean of its divisors is an integer number (12320208).

Almost surely, 2^128790039 is an apocalyptic number.

128790039 is a deficient number, since it is larger than the sum of its proper divisors (68333289).

128790039 is a wasteful number, since it uses less digits than its factorization.

128790039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27254.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 128790039 is about 11348.5699099049. The cubic root of 128790039 is about 505.0031552265.

The spelling of 128790039 in words is "one hundred twenty-eight million, seven hundred ninety thousand, thirty-nine".