128304015 has 32 divisors (see below), whose sum is σ = 248417280. Its totient is φ = 55202304.

The previous prime is 128303999. The next prime is 128304019. The reversal of 128304015 is 510403821.

It is not a de Polignac number, because 128304015 - 2⁴ = 128303999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128304019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34155 + ... + 37724.

It is an arithmetic number, because the mean of its divisors is an integer number (7763040).

Almost surely, 2^128304015 is an apocalyptic number.

128304015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128304015 is a deficient number, since it is larger than the sum of its proper divisors (120113265).

128304015 is a wasteful number, since it uses less digits than its factorization.

128304015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71911.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 128304015 is about 11327.1362223644. The cubic root of 128304015 is about 504.3670991731.

Adding to 128304015 its reverse (510403821), we get a palindrome (638707836).

The spelling of 128304015 in words is "one hundred twenty-eight million, three hundred four thousand, fifteen".