189392644 has 27 divisors (see below), whose sum is σ = 385941927. Its totient is φ = 81085704.

The previous prime is 189392641. The next prime is 189392647. The reversal of 189392644 is 446293981.

The square root of 189392644 is 13762.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (189392641) and next prime (189392647).

It is a junction number, because it is equal to n+sod(n) for n = 189392594 and 189392603.

It is not an unprimeable number, because it can be changed into a prime (189392641) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 192177 + ... + 193159.

Almost surely, 2^189392644 is an apocalyptic number.

189392644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

189392644 is the 13762-nd square number.

It is an amenable number.

189392644 is an abundant number, since it is smaller than the sum of its proper divisors (196549283).

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

189392644 is an frugal number, since it uses more digits than its factorization.

189392644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984 (or 992 counting only the distinct ones).

The product of its digits is 373248, while the sum is 46.

The cubic root of 189392644 is about 574.2764878571.

It can be divided in two parts, 189392 and 644, that added together give a triangular number (190036 = T₆₁₆).

The spelling of 189392644 in words is "one hundred eighty-nine million, three hundred ninety-two thousand, six hundred forty-four".