128825532 has 48 divisors (see below), whose sum is σ = 364358400. Its totient is φ = 39037680.

The previous prime is 128825513. The next prime is 128825561. The reversal of 128825532 is 235528821.

128825532 is a `hidden beast` number, since 1 + 28 + 82 + 553 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53032 + ... + 55407.

It is an arithmetic number, because the mean of its divisors is an integer number (7590800).

Almost surely, 2^128825532 is an apocalyptic number.

128825532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128825532 is an abundant number, since it is smaller than the sum of its proper divisors (235532868).

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

128825532 is a wasteful number, since it uses less digits than its factorization.

128825532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108463 (or 108455 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 128825532 is about 11350.1335674960. The cubic root of 128825532 is about 505.0495419161.

The spelling of 128825532 in words is "one hundred twenty-eight million, eight hundred twenty-five thousand, five hundred thirty-two".