189402445 has 16 divisors (see below), whose sum is σ = 234948528. Its totient is φ = 146465280.

The previous prime is 189402403. The next prime is 189402497. The reversal of 189402445 is 544204981.

It can be written as a sum of positive squares in 8 ways, for example, as 17189316 + 172213129 = 4146^2 + 13123^2 .

It is not a de Polignac number, because 189402445 - 2¹¹ = 189400397 is a prime.

It is a super-3 number, since 3×189402445³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25785 + ... + 32305.

It is an arithmetic number, because the mean of its divisors is an integer number (14684283).

Almost surely, 2^189402445 is an apocalyptic number.

It is an amenable number.

189402445 is a deficient number, since it is larger than the sum of its proper divisors (45546083).

189402445 is a wasteful number, since it uses less digits than its factorization.

189402445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6720.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 189402445 is about 13762.3560846245. The cubic root of 189402445 is about 574.2863938856.

The spelling of 189402445 in words is "one hundred eighty-nine million, four hundred two thousand, four hundred forty-five".