128391230 has 16 divisors (see below), whose sum is σ = 252113904. Its totient is φ = 46687680.

The previous prime is 128391199. The next prime is 128391233. The reversal of 128391230 is 32193821.

It is a junction number, because it is equal to n+sod(n) for n = 128391193 and 128391202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128391233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583487 + ... + 583706.

It is an arithmetic number, because the mean of its divisors is an integer number (15757119).

Almost surely, 2^128391230 is an apocalyptic number.

128391230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128391230 is a deficient number, since it is larger than the sum of its proper divisors (123722674).

128391230 is a wasteful number, since it uses less digits than its factorization.

128391230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167211.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 128391230 is about 11330.9853940423. The cubic root of 128391230 is about 504.4813549202.

The spelling of 128391230 in words is "one hundred twenty-eight million, three hundred ninety-one thousand, two hundred thirty".