128216579 has 8 divisors (see below), whose sum is σ = 135529680. Its totient is φ = 120960000.

The previous prime is 128216531. The next prime is 128216603. The reversal of 128216579 is 975612821.

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 128216579 - 2⁸ = 128216323 is a prime.

It is a super-2 number, since 2×128216579² = 32878982260926482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128216509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9422 + ... + 18579.

It is an arithmetic number, because the mean of its divisors is an integer number (16941210).

Almost surely, 2^128216579 is an apocalyptic number.

128216579 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128216579 is a deficient number, since it is larger than the sum of its proper divisors (7313101).

128216579 is a wasteful number, since it uses less digits than its factorization.

128216579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28261.

The product of its digits is 60480, while the sum is 41.

The square root of 128216579 is about 11323.2759835659. The cubic root of 128216579 is about 504.2525019198.

The spelling of 128216579 in words is "one hundred twenty-eight million, two hundred sixteen thousand, five hundred seventy-nine".