189273644 has 48 divisors (see below), whose sum is σ = 385287168. Its totient is φ = 79688448.

The previous prime is 189273607. The next prime is 189273661. The reversal of 189273644 is 446372981.

It is a junction number, because it is equal to n+sod(n) for n = 189273595 and 189273604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515549 + ... + 515915.

It is an arithmetic number, because the mean of its divisors is an integer number (8026816).

Almost surely, 2^189273644 is an apocalyptic number.

189273644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

189273644 is an abundant number, since it is smaller than the sum of its proper divisors (196013524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189273644 is a wasteful number, since it uses less digits than its factorization.

189273644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 652 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 189273644 is about 13757.6758211553. The cubic root of 189273644 is about 574.1561853670.

The spelling of 189273644 in words is "one hundred eighty-nine million, two hundred seventy-three thousand, six hundred forty-four".