189388641 has 32 divisors (see below), whose sum is σ = 287322112. Its totient is φ = 110134080.

The previous prime is 189388627. The next prime is 189388651. The reversal of 189388641 is 146883981.

It is not a de Polignac number, because 189388641 - 2⁷ = 189388513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189388651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50166 + ... + 53808.

It is an arithmetic number, because the mean of its divisors is an integer number (8978816).

Almost surely, 2^189388641 is an apocalyptic number.

It is an amenable number.

189388641 is a deficient number, since it is larger than the sum of its proper divisors (97933471).

189388641 is a wasteful number, since it uses less digits than its factorization.

189388641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733.

The product of its digits is 331776, while the sum is 48.

The square root of 189388641 is about 13761.8545625217. The cubic root of 189388641 is about 574.2724418623.

The spelling of 189388641 in words is "one hundred eighty-nine million, three hundred eighty-eight thousand, six hundred forty-one".