128550530 has 8 divisors (see below), whose sum is σ = 231390972. Its totient is φ = 51420208.

The previous prime is 128550529. The next prime is 128550547. The reversal of 128550530 is 35055821.

It can be written as a sum of positive squares in 2 ways, for example, as 123854641 + 4695889 = 11129^2 + 2167^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 128550493 and 128550502.

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, 6427517 + ... + 6427536.

Almost surely, 2^128550530 is an apocalyptic number.

128550530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128550530 is a deficient number, since it is larger than the sum of its proper divisors (102840442).

128550530 is a wasteful number, since it uses less digits than its factorization.

128550530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12855060.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 128550530 is about 11338.0126124467. The cubic root of 128550530 is about 504.6899119113.

It can be divided in two parts, 1285 and 50530, that added together give a palindrome (51815).

The spelling of 128550530 in words is "one hundred twenty-eight million, five hundred fifty thousand, five hundred thirty".