128358280 has 16 divisors (see below), whose sum is σ = 288806220. Its totient is φ = 51343296.

The previous prime is 128358229. The next prime is 128358283. The reversal of 128358280 is 82853821.

It can be written as a sum of positive squares in 2 ways, for example, as 124679556 + 3678724 = 11166^2 + 1918^2 .

It is not an unprimeable number, because it can be changed into a prime (128358283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604439 + ... + 1604518.

Almost surely, 2^128358280 is an apocalyptic number.

128358280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128358280 is an abundant number, since it is smaller than the sum of its proper divisors (160447940).

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

128358280 is a wasteful number, since it uses less digits than its factorization.

128358280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208968 (or 3208964 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 128358280 is about 11329.5313230513. The cubic root of 128358280 is about 504.4381949555.

It can be divided in two parts, 12835 and 8280, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 128358280 in words is "one hundred twenty-eight million, three hundred fifty-eight thousand, two hundred eighty".