189138441 has 8 divisors (see below), whose sum is σ = 252291424. Its totient is φ = 126038880.

The previous prime is 189138437. The next prime is 189138497. The reversal of 189138441 is 144831981.

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

It is not a de Polignac number, because 189138441 - 2² = 189138437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189138441.

It is not an unprimeable number, because it can be changed into a prime (189138421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4195 + ... + 19896.

It is an arithmetic number, because the mean of its divisors is an integer number (31536428).

Almost surely, 2^189138441 is an apocalyptic number.

It is an amenable number.

189138441 is a deficient number, since it is larger than the sum of its proper divisors (63152983).

189138441 is a wasteful number, since it uses less digits than its factorization.

189138441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26711.

The product of its digits is 27648, while the sum is 39.

The square root of 189138441 is about 13752.7612136618. The cubic root of 189138441 is about 574.0194413241.

The spelling of 189138441 in words is "one hundred eighty-nine million, one hundred thirty-eight thousand, four hundred forty-one".