128210330 has 16 divisors (see below), whose sum is σ = 230911560. Its totient is φ = 51254592.

The previous prime is 128210323. The next prime is 128210351. The reversal of 128210330 is 33012821.

It is a Cunningham number, because it is equal to 11323²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 80586529 + 47623801 = 8977^2 + 6901^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25592 + ... + 30188.

Almost surely, 2^128210330 is an apocalyptic number.

128210330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128210330 is a deficient number, since it is larger than the sum of its proper divisors (102701230).

128210330 is a wasteful number, since it uses less digits than its factorization.

128210330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7393.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 128210330 is about 11323.0000441579. Note that the first 4 decimals coincide. The cubic root of 128210330 is about 504.2443097263.

The spelling of 128210330 in words is "one hundred twenty-eight million, two hundred ten thousand, three hundred thirty".