189307445 has 8 divisors (see below), whose sum is σ = 228903840. Its totient is φ = 150289360.

The previous prime is 189307441. The next prime is 189307453. The reversal of 189307445 is 544703981.

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

It is not a de Polignac number, because 189307445 - 2² = 189307441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189307441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143855 + ... + 145164.

It is an arithmetic number, because the mean of its divisors is an integer number (28612980).

Almost surely, 2^189307445 is an apocalyptic number.

It is an amenable number.

189307445 is a deficient number, since it is larger than the sum of its proper divisors (39596395).

189307445 is a wasteful number, since it uses less digits than its factorization.

189307445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289155.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 189307445 is about 13758.9042078212. The cubic root of 189307445 is about 574.1903614549.

The spelling of 189307445 in words is "one hundred eighty-nine million, three hundred seven thousand, four hundred forty-five".