449681989 has 8 divisors (see below), whose sum is σ = 451680768. Its totient is φ = 447688560.

The previous prime is 449681959. The next prime is 449682017. The reversal of 449681989 is 989186944.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 449681989 - 2⁷ = 449681861 is a prime.

It is a super-2 number, since 2×449681989² = 404427782461992242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449681929) 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, 279024 + ... + 280630.

It is an arithmetic number, because the mean of its divisors is an integer number (56460096).

Almost surely, 2^449681989 is an apocalyptic number.

It is an amenable number.

449681989 is a deficient number, since it is larger than the sum of its proper divisors (1998779).

449681989 is a wasteful number, since it uses less digits than its factorization.

449681989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675.

The product of its digits is 4478976, while the sum is 58.

The square root of 449681989 is about 21205.7065197083. The cubic root of 449681989 is about 766.1288751661.

The spelling of 449681989 in words is "four hundred forty-nine million, six hundred eighty-one thousand, nine hundred eighty-nine".