189045506 has 32 divisors (see below), whose sum is σ = 321351408. Its totient is φ = 82805760.

The previous prime is 189045481. The next prime is 189045509. The reversal of 189045506 is 605540981.

It can be written as a sum of positive squares in 8 ways, for example, as 85840225 + 103205281 = 9265^2 + 10159^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 189045506.

It is not an unprimeable number, because it can be changed into a prime (189045509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37046 + ... + 41838.

Almost surely, 2^189045506 is an apocalyptic number.

189045506 is a deficient number, since it is larger than the sum of its proper divisors (132305902).

189045506 is a wasteful number, since it uses less digits than its factorization.

189045506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 189045506 is about 13749.3820224765. The cubic root of 189045506 is about 573.9254092555.

The spelling of 189045506 in words is "one hundred eighty-nine million, forty-five thousand, five hundred six".