128273480 has 16 divisors (see below), whose sum is σ = 288615420. Its totient is φ = 51309376.

The previous prime is 128273477. The next prime is 128273491. The reversal of 128273480 is 84372821.

It can be written as a sum of positive squares in 2 ways, for example, as 126472516 + 1800964 = 11246^2 + 1342^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128273480.

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, 1603379 + ... + 1603458.

Almost surely, 2^128273480 is an apocalyptic number.

128273480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128273480 is an abundant number, since it is smaller than the sum of its proper divisors (160341940).

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

128273480 is a wasteful number, since it uses less digits than its factorization.

128273480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206848 (or 3206844 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 128273480 is about 11325.7882727870. The cubic root of 128273480 is about 504.3270846517.

The spelling of 128273480 in words is "one hundred twenty-eight million, two hundred seventy-three thousand, four hundred eighty".