128784163 has 8 divisors (see below), whose sum is σ = 136801008. Its totient is φ = 120816384.

The previous prime is 128784143. The next prime is 128784169. The reversal of 128784163 is 361487821.

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

It is a cyclic number.

It is not a de Polignac number, because 128784163 - 2⁹ = 128783651 is a prime.

It is a super-2 number, since 2×128784163² = 33170721279221138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128784169) 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, 6781 + ... + 17422.

It is an arithmetic number, because the mean of its divisors is an integer number (17100126).

Almost surely, 2^128784163 is an apocalyptic number.

128784163 is a deficient number, since it is larger than the sum of its proper divisors (8016845).

128784163 is a wasteful number, since it uses less digits than its factorization.

128784163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24533.

The product of its digits is 64512, while the sum is 40.

The square root of 128784163 is about 11348.3110197069. The cubic root of 128784163 is about 504.9954749129.

The spelling of 128784163 in words is "one hundred twenty-eight million, seven hundred eighty-four thousand, one hundred sixty-three".