128320802 has 8 divisors (see below), whose sum is σ = 192962412. Its totient is φ = 64000000.

The previous prime is 128320793. The next prime is 128320807. The reversal of 128320802 is 208023821.

It can be written as a sum of positive squares in 2 ways, for example, as 70879561 + 57441241 = 8419^2 + 7579^2 .

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

It is not an unprimeable number, because it can be changed into a prime (128320807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79199 + ... + 80802.

Almost surely, 2^128320802 is an apocalyptic number.

128320802 is a deficient number, since it is larger than the sum of its proper divisors (64641610).

128320802 is a wasteful number, since it uses less digits than its factorization.

128320802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160404.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 128320802 is about 11327.8772062554. The cubic root of 128320802 is about 504.3890949547.

The spelling of 128320802 in words is "one hundred twenty-eight million, three hundred twenty thousand, eight hundred two".