128279130 has 64 divisors (see below), whose sum is σ = 354613248. Its totient is φ = 29090880.

The previous prime is 128279117. The next prime is 128279149. The reversal of 128279130 is 31972821.

It is a junction number, because it is equal to n+sod(n) for n = 128279091 and 128279100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25179 + ... + 29841.

It is an arithmetic number, because the mean of its divisors is an integer number (5540832).

Almost surely, 2^128279130 is an apocalyptic number.

128279130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128279130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177306624).

128279130 is an abundant number, since it is smaller than the sum of its proper divisors (226334118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128279130 is a wasteful number, since it uses less digits than its factorization.

128279130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4811.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 128279130 is about 11326.0377008025. The cubic root of 128279130 is about 504.3344891601.

It can be divided in two parts, 1282791 and 30, that added together give a palindrome (1282821).

The spelling of 128279130 in words is "one hundred twenty-eight million, two hundred seventy-nine thousand, one hundred thirty".