189366446 has 4 divisors (see below), whose sum is σ = 284049672. Its totient is φ = 94683222.

The previous prime is 189366421. The next prime is 189366449. The reversal of 189366446 is 644663981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644663981 = 13 ⋅49589537.

It is a self number, because there is not a number n which added to its sum of digits gives 189366446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189366449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47341610 + ... + 47341613.

It is an arithmetic number, because the mean of its divisors is an integer number (71012418).

Almost surely, 2^189366446 is an apocalyptic number.

189366446 is a deficient number, since it is larger than the sum of its proper divisors (94683226).

189366446 is an equidigital number, since it uses as much as digits as its factorization.

189366446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94683225.

The product of its digits is 746496, while the sum is 47.

The square root of 189366446 is about 13761.0481432193. The cubic root of 189366446 is about 574.2500074391.

The spelling of 189366446 in words is "one hundred eighty-nine million, three hundred sixty-six thousand, four hundred forty-six".