128317616 has 20 divisors (see below), whose sum is σ = 284132112. Its totient is φ = 54993216.

The previous prime is 128317603. The next prime is 128317699. The reversal of 128317616 is 616713821.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572735 + ... + 572958.

Almost surely, 2^128317616 is an apocalyptic number.

128317616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128317616 is an abundant number, since it is smaller than the sum of its proper divisors (155814496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128317616 is a wasteful number, since it uses less digits than its factorization.

128317616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145708 (or 1145702 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 128317616 is about 11327.7365788581. The cubic root of 128317616 is about 504.3849205290.

The spelling of 128317616 in words is "one hundred twenty-eight million, three hundred seventeen thousand, six hundred sixteen".