189489645 has 16 divisors (see below), whose sum is σ = 336870720. Its totient is φ = 101061072.

The previous prime is 189489631. The next prime is 189489647. The reversal of 189489645 is 546984981.

It is not a de Polignac number, because 189489645 - 2⁵ = 189489613 is a prime.

It is a super-3 number, since 3×189489645³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189489591 and 189489600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189489647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701679 + ... + 701948.

It is an arithmetic number, because the mean of its divisors is an integer number (21054420).

Almost surely, 2^189489645 is an apocalyptic number.

189489645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189489645 is a deficient number, since it is larger than the sum of its proper divisors (147381075).

189489645 is a wasteful number, since it uses less digits than its factorization.

189489645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403641 (or 1403635 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 189489645 is about 13765.5237822612. The cubic root of 189489645 is about 574.3745132872.

The spelling of 189489645 in words is "one hundred eighty-nine million, four hundred eighty-nine thousand, six hundred forty-five".