190446389 has 6 divisors (see below), whose sum is σ = 221539734. Its totient is φ = 163239720.

The previous prime is 190446379. The next prime is 190446407. The reversal of 190446389 is 983644091.

It can be written as a sum of positive squares in only one way, i.e., 138462289 + 51984100 = 11767^2 + 7210^2 .

It is a de Polignac number, because none of the positive numbers 2^k-190446389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190446349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1943282 + ... + 1943379.

It is an arithmetic number, because the mean of its divisors is an integer number (36923289).

Almost surely, 2^190446389 is an apocalyptic number.

It is an amenable number.

190446389 is a deficient number, since it is larger than the sum of its proper divisors (31093345).

190446389 is an equidigital number, since it uses as much as digits as its factorization.

190446389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886675 (or 3886668 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 190446389 is about 13800.2314835658. The cubic root of 190446389 is about 575.3395740896.

The spelling of 190446389 in words is "one hundred ninety million, four hundred forty-six thousand, three hundred eighty-nine".