128440130 has 128 divisors (see below), whose sum is σ = 305786880. Its totient is φ = 37739520.

The previous prime is 128440087. The next prime is 128440153. The reversal of 128440130 is 31044821.

It is a junction number, because it is equal to n+sod(n) for n = 128440096 and 128440105.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 818012 + ... + 818168.

It is an arithmetic number, because the mean of its divisors is an integer number (2388960).

Almost surely, 2^128440130 is an apocalyptic number.

128440130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128440130 is an abundant number, since it is smaller than the sum of its proper divisors (177346750).

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

128440130 is a wasteful number, since it uses less digits than its factorization.

128440130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 128440130 is about 11333.1429885976. The cubic root of 128440130 is about 504.5453935803.

Adding to 128440130 its reverse (31044821), we get a palindrome (159484951).

It can be divided in two parts, 1284 and 40130, that added together give a palindrome (41414).

The spelling of 128440130 in words is "one hundred twenty-eight million, four hundred forty thousand, one hundred thirty".