128804519 has 4 divisors (see below), whose sum is σ = 129944496. Its totient is φ = 127664544.

The previous prime is 128804491. The next prime is 128804539. The reversal of 128804519 is 915408821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128804519 - 2¹⁶ = 128738983 is a prime.

It is a super-2 number, since 2×128804519² = 33181208229642722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128804539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569819 + ... + 570044.

It is an arithmetic number, because the mean of its divisors is an integer number (32486124).

Almost surely, 2^128804519 is an apocalyptic number.

128804519 is a deficient number, since it is larger than the sum of its proper divisors (1139977).

128804519 is a wasteful number, since it uses less digits than its factorization.

128804519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139976.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 128804519 is about 11349.2078578199. The cubic root of 128804519 is about 505.0220805298.

The spelling of 128804519 in words is "one hundred twenty-eight million, eight hundred four thousand, five hundred nineteen".