128403079 has 10 divisors (see below), whose sum is σ = 149797480. Its totient is φ = 110057724.

The previous prime is 128402999. The next prime is 128403133. The reversal of 128403079 is 970304821.

It is not a de Polignac number, because 128403079 - 2⁹ = 128402567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128403679) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24339 + ... + 29140.

It is an arithmetic number, because the mean of its divisors is an integer number (14979748).

Almost surely, 2^128403079 is an apocalyptic number.

128403079 is a deficient number, since it is larger than the sum of its proper divisors (21394401).

128403079 is an frugal number, since it uses more digits than its factorization.

128403079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53507 (or 53486 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 128403079 is about 11331.5082403006. The cubic root of 128403079 is about 504.4968736740.

The spelling of 128403079 in words is "one hundred twenty-eight million, four hundred three thousand, seventy-nine".