128317620 has 48 divisors (see below), whose sum is σ = 361202688. Its totient is φ = 34035840.

The previous prime is 128317603. The next prime is 128317699. The reversal of 128317620 is 26713821.

128317620 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

128317620 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5862 + ... + 17058.

It is an arithmetic number, because the mean of its divisors is an integer number (7525056).

Almost surely, 2^128317620 is an apocalyptic number.

128317620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128317620 is an abundant number, since it is smaller than the sum of its proper divisors (232885068).

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

128317620 is a wasteful number, since it uses less digits than its factorization.

128317620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11400 (or 11398 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 128317620 is about 11327.7367554159. The cubic root of 128317620 is about 504.3849257700.

The spelling of 128317620 in words is "one hundred twenty-eight million, three hundred seventeen thousand, six hundred twenty".