128532272 has 20 divisors (see below), whose sum is σ = 271670856. Its totient is φ = 58423680.

The previous prime is 128532269. The next prime is 128532277. The reversal of 128532272 is 272235821.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (128532277) 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, 364973 + ... + 365324.

Almost surely, 2^128532272 is an apocalyptic number.

It is an amenable number.

128532272 is an abundant number, since it is smaller than the sum of its proper divisors (143138584).

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

128532272 is a wasteful number, since it uses less digits than its factorization.

128532272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730316 (or 730310 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 128532272 is about 11337.2074162908. The cubic root of 128532272 is about 504.6660171189. Note that the first 3 decimals are identical.

The spelling of 128532272 in words is "one hundred twenty-eight million, five hundred thirty-two thousand, two hundred seventy-two".