189320690 has 16 divisors (see below), whose sum is σ = 366991128. Its totient is φ = 69902976.

The previous prime is 189320669. The next prime is 189320699. The reversal of 189320690 is 96023981.

It can be written as a sum of positive squares in 4 ways, for example, as 66797929 + 122522761 = 8173^2 + 11069^2 .

It is a super-2 number, since 2×189320690² = 71684647324152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189320699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728027 + ... + 728286.

Almost surely, 2^189320690 is an apocalyptic number.

189320690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189320690 is a deficient number, since it is larger than the sum of its proper divisors (177670438).

189320690 is a wasteful number, since it uses less digits than its factorization.

189320690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456333.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 189320690 is about 13759.3855240705. The cubic root of 189320690 is about 574.2037523246.

The spelling of 189320690 in words is "one hundred eighty-nine million, three hundred twenty thousand, six hundred ninety".