189449385 has 16 divisors (see below), whose sum is σ = 305954496. Its totient is φ = 100094528.

The previous prime is 189449383. The next prime is 189449387. The reversal of 189449385 is 583944981.

It is an interprime number because it is at equal distance from previous prime (189449383) and next prime (189449387).

It is a cyclic number.

It is not a de Polignac number, because 189449385 - 2¹ = 189449383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189449383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57414 + ... + 60623.

It is an arithmetic number, because the mean of its divisors is an integer number (19122156).

Almost surely, 2^189449385 is an apocalyptic number.

189449385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189449385 is a deficient number, since it is larger than the sum of its proper divisors (116505111).

189449385 is a wasteful number, since it uses less digits than its factorization.

189449385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118152.

The product of its digits is 1244160, while the sum is 51.

The square root of 189449385 is about 13764.0613555738. The cubic root of 189449385 is about 574.3338321622. Note that the first 3 decimals are identical.

The spelling of 189449385 in words is "one hundred eighty-nine million, four hundred forty-nine thousand, three hundred eighty-five".