128313890 has 16 divisors (see below), whose sum is σ = 231327360. Its totient is φ = 51245040.

The previous prime is 128313877. The next prime is 128313907. The reversal of 128313890 is 98313821.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128313890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 16325.

It is an arithmetic number, because the mean of its divisors is an integer number (14457960).

Almost surely, 2^128313890 is an apocalyptic number.

128313890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128313890 is a deficient number, since it is larger than the sum of its proper divisors (103013470).

128313890 is a wasteful number, since it uses less digits than its factorization.

128313890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20137.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 128313890 is about 11327.5721140940. The cubic root of 128313890 is about 504.3800384859.

The spelling of 128313890 in words is "one hundred twenty-eight million, three hundred thirteen thousand, eight hundred ninety".