32128506 has 48 divisors (see below), whose sum is σ = 75285600. Its totient is φ = 9867744.

The previous prime is 32128483. The next prime is 32128519. The reversal of 32128506 is 60582123.

32128506 is a `hidden beast` number, since 32 + 128 + 506 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 32128506.

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 23 ways as a sum of consecutive naturals, for example, 11385 + ... + 13923.

It is an arithmetic number, because the mean of its divisors is an integer number (1568450).

Almost surely, 2^32128506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32128506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37642800).

32128506 is an abundant number, since it is smaller than the sum of its proper divisors (43157094).

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

32128506 is a wasteful number, since it uses less digits than its factorization.

32128506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603 (or 2600 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 32128506 is about 5668.2013020005. The cubic root of 32128506 is about 317.9046231115.

The spelling of 32128506 in words is "thirty-two million, one hundred twenty-eight thousand, five hundred six".