189647090 has 8 divisors (see below), whose sum is σ = 341364780. Its totient is φ = 75858832.

The previous prime is 189647083. The next prime is 189647093. The reversal of 189647090 is 90746981.

It can be written as a sum of positive squares in 2 ways, for example, as 184389241 + 5257849 = 13579^2 + 2293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (189647093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9482345 + ... + 9482364.

Almost surely, 2^189647090 is an apocalyptic number.

189647090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189647090 is a deficient number, since it is larger than the sum of its proper divisors (151717690).

189647090 is a wasteful number, since it uses less digits than its factorization.

189647090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18964716.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 189647090 is about 13771.2414109985. The cubic root of 189647090 is about 574.5335498761.

The spelling of 189647090 in words is "one hundred eighty-nine million, six hundred forty-seven thousand, ninety".