128651330 has 8 divisors (see below), whose sum is σ = 231572412. Its totient is φ = 51460528.

The previous prime is 128651321. The next prime is 128651339. The reversal of 128651330 is 33156821.

It is an interprime number because it is at equal distance from previous prime (128651321) and next prime (128651339).

It can be written as a sum of positive squares in 2 ways, for example, as 110901961 + 17749369 = 10531^2 + 4213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 128651293 and 128651302.

It is not an unprimeable number, because it can be changed into a prime (128651339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6432557 + ... + 6432576.

Almost surely, 2^128651330 is an apocalyptic number.

128651330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128651330 is a deficient number, since it is larger than the sum of its proper divisors (102921082).

128651330 is a wasteful number, since it uses less digits than its factorization.

128651330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12865140.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 128651330 is about 11342.4569648732. The cubic root of 128651330 is about 504.8217911861.

The spelling of 128651330 in words is "one hundred twenty-eight million, six hundred fifty-one thousand, three hundred thirty".