128158280 has 16 divisors (see below), whose sum is σ = 288356220. Its totient is φ = 51263296.

The previous prime is 128158267. The next prime is 128158297. The reversal of 128158280 is 82851821.

It can be written as a sum of positive squares in 2 ways, for example, as 119990116 + 8168164 = 10954^2 + 2858^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128158280.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601939 + ... + 1602018.

Almost surely, 2^128158280 is an apocalyptic number.

128158280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128158280 is an abundant number, since it is smaller than the sum of its proper divisors (160197940).

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

128158280 is a wasteful number, since it uses less digits than its factorization.

128158280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203968 (or 3203964 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 128158280 is about 11320.7013916983. The cubic root of 128158280 is about 504.1760638763.

The spelling of 128158280 in words is "one hundred twenty-eight million, one hundred fifty-eight thousand, two hundred eighty".