128319390 has 40 divisors (see below), whose sum is σ = 345038760. Its totient is φ = 34218288.

The previous prime is 128319377. The next prime is 128319421. The reversal of 128319390 is 93913821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78400 + ... + 80019.

It is an arithmetic number, because the mean of its divisors is an integer number (8625969).

Almost surely, 2^128319390 is an apocalyptic number.

128319390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128319390 is an abundant number, since it is smaller than the sum of its proper divisors (216719370).

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

128319390 is a wasteful number, since it uses less digits than its factorization.

128319390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158438 (or 158429 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 128319390 is about 11327.8148819620. The cubic root of 128319390 is about 504.3872449039.

The spelling of 128319390 in words is "one hundred twenty-eight million, three hundred nineteen thousand, three hundred ninety".