446347989 has 24 divisors (see below), whose sum is σ = 670345312. Its totient is φ = 296790480.

The previous prime is 446347973. The next prime is 446347999. The reversal of 446347989 is 989743644.

It is a happy number.

It is not a de Polignac number, because 446347989 - 2⁴ = 446347973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (446347939) 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 in 23 ways as a sum of consecutive naturals, for example, 100122 + ... + 104484.

Almost surely, 2^446347989 is an apocalyptic number.

It is an amenable number.

446347989 is a deficient number, since it is larger than the sum of its proper divisors (223997323).

446347989 is an equidigital number, since it uses as much as digits as its factorization.

446347989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799 (or 4787 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 446347989 is about 21126.9493538466. The cubic root of 446347989 is about 764.2307838972.

The spelling of 446347989 in words is "four hundred forty-six million, three hundred forty-seven thousand, nine hundred eighty-nine".