128009330 has 16 divisors (see below), whose sum is σ = 230598360. Its totient is φ = 51163392.

The previous prime is 128009281. The next prime is 128009333. The reversal of 128009330 is 33900821.

It can be written as a sum of positive squares in 4 ways, for example, as 97792321 + 30217009 = 9889^2 + 5497^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128009330.

It is not an unprimeable number, because it can be changed into a prime (128009333) 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, 10592 + ... + 19188.

Almost surely, 2^128009330 is an apocalyptic number.

128009330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128009330 is a deficient number, since it is larger than the sum of its proper divisors (102589030).

128009330 is a wasteful number, since it uses less digits than its factorization.

128009330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10093.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 128009330 is about 11314.1208231130. The cubic root of 128009330 is about 503.9806645182.

The spelling of 128009330 in words is "one hundred twenty-eight million, nine thousand, three hundred thirty".