386440189 has 2 divisors, whose sum is σ = 386440190. Its totient is φ = 386440188.

The previous prime is 386440169. The next prime is 386440199. The reversal of 386440189 is 981044683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385808164 + 632025 = 19642^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 386440189 - 2¹⁵ = 386407421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386440169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193220094 + 193220095.

It is an arithmetic number, because the mean of its divisors is an integer number (193220095).

Almost surely, 2^386440189 is an apocalyptic number.

It is an amenable number.

386440189 is a deficient number, since it is larger than the sum of its proper divisors (1).

386440189 is an equidigital number, since it uses as much as digits as its factorization.

386440189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 386440189 is about 19658.0820275021. The cubic root of 386440189 is about 728.3846115308.

The spelling of 386440189 in words is "three hundred eighty-six million, four hundred forty thousand, one hundred eighty-nine".