449992989 has 24 divisors (see below), whose sum is σ = 681670080. Its totient is φ = 296610336.

The previous prime is 449992987. The next prime is 449993003. The reversal of 449992989 is 989299944.

449992989 is a `hidden beast` number, since 449 + 99 + 29 + 89 = 666.

It is not a de Polignac number, because 449992989 - 2¹ = 449992987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449992981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11224 + ... + 32030.

It is an arithmetic number, because the mean of its divisors is an integer number (28402920).

Almost surely, 2^449992989 is an apocalyptic number.

It is an amenable number.

449992989 is a deficient number, since it is larger than the sum of its proper divisors (231677091).

449992989 is an equidigital number, since it uses as much as digits as its factorization.

449992989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20911 (or 20899 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 63.

The square root of 449992989 is about 21213.0381840980. The cubic root of 449992989 is about 766.3054526726.

The spelling of 449992989 in words is "four hundred forty-nine million, nine hundred ninety-two thousand, nine hundred eighty-nine".