128322890 has 8 divisors (see below), whose sum is σ = 230981220. Its totient is φ = 51329152.

The previous prime is 128322881. The next prime is 128322893. The reversal of 128322890 is 98223821.

It can be written as a sum of positive squares in 2 ways, for example, as 109599961 + 18722929 = 10469^2 + 4327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 128322890.

It is not an unprimeable number, because it can be changed into a prime (128322893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416135 + ... + 6416154.

Almost surely, 2^128322890 is an apocalyptic number.

128322890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128322890 is a deficient number, since it is larger than the sum of its proper divisors (102658330).

128322890 is a wasteful number, since it uses less digits than its factorization.

128322890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832296.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 128322890 is about 11327.9693678964. The cubic root of 128322890 is about 504.3918306990.

The spelling of 128322890 in words is "one hundred twenty-eight million, three hundred twenty-two thousand, eight hundred ninety".