128280770 has 8 divisors (see below), whose sum is σ = 230905404. Its totient is φ = 51312304.

The previous prime is 128280749. The next prime is 128280781. The reversal of 128280770 is 77082821.

It can be written as a sum of positive squares in 2 ways, for example, as 125193721 + 3087049 = 11189^2 + 1757^2 .

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 128280770.

It is an unprimeable number.

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, 6414029 + ... + 6414048.

Almost surely, 2^128280770 is an apocalyptic number.

128280770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128280770 is a deficient number, since it is larger than the sum of its proper divisors (102624634).

128280770 is a wasteful number, since it uses less digits than its factorization.

128280770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12828084.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 128280770 is about 11326.1101001182. The cubic root of 128280770 is about 504.3366383926.

The spelling of 128280770 in words is "one hundred twenty-eight million, two hundred eighty thousand, seven hundred seventy".