189662290 has 8 divisors (see below), whose sum is σ = 341392140. Its totient is φ = 75864912.

The previous prime is 189662287. The next prime is 189662381. The reversal of 189662290 is 92266981.

It can be written as a sum of positive squares in 2 ways, for example, as 183954969 + 5707321 = 13563^2 + 2389^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 9483105 + ... + 9483124.

Almost surely, 2^189662290 is an apocalyptic number.

189662290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189662290 is a deficient number, since it is larger than the sum of its proper divisors (151729850).

189662290 is a wasteful number, since it uses less digits than its factorization.

189662290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18966236.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 189662290 is about 13771.7932746611. The cubic root of 189662290 is about 574.5488988710.

The spelling of 189662290 in words is "one hundred eighty-nine million, six hundred sixty-two thousand, two hundred ninety".