128319417 has 32 divisors (see below), whose sum is σ = 204629760. Its totient is φ = 79176960.

The previous prime is 128319377. The next prime is 128319421. The reversal of 128319417 is 714913821.

It is a happy number.

It is not a de Polignac number, because 128319417 - 2⁸ = 128319161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128319427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25708 + ... + 30290.

It is an arithmetic number, because the mean of its divisors is an integer number (6394680).

Almost surely, 2^128319417 is an apocalyptic number.

128319417 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

128319417 is a deficient number, since it is larger than the sum of its proper divisors (76310343).

128319417 is a wasteful number, since it uses less digits than its factorization.

128319417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670 (or 4664 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 128319417 is about 11327.8160737187. The cubic root of 128319417 is about 504.3872802803.

The spelling of 128319417 in words is "one hundred twenty-eight million, three hundred nineteen thousand, four hundred seventeen".