128312619 has 8 divisors (see below), whose sum is σ = 171577920. Its totient is φ = 85294536.

The previous prime is 128312603. The next prime is 128312621. The reversal of 128312619 is 916213821.

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

It is not a de Polignac number, because 128312619 - 2⁴ = 128312603 is a prime.

It is a super-2 number, since 2×128312619² = 32928256389278322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128312619.

It is not an unprimeable number, because it can be changed into a prime (128312519) 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, 60589 + ... + 62670.

It is an arithmetic number, because the mean of its divisors is an integer number (21447240).

Almost surely, 2^128312619 is an apocalyptic number.

128312619 is a deficient number, since it is larger than the sum of its proper divisors (43265301).

128312619 is a wasteful number, since it uses less digits than its factorization.

128312619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123609.

The product of its digits is 5184, while the sum is 33.

The square root of 128312619 is about 11327.5160119066. The cubic root of 128312619 is about 504.3783731189.

The spelling of 128312619 in words is "one hundred twenty-eight million, three hundred twelve thousand, six hundred nineteen".