449591889 has 32 divisors (see below), whose sum is σ = 644474880. Its totient is φ = 277955712.

The previous prime is 449591867. The next prime is 449591893. The reversal of 449591889 is 988195944.

It is not a de Polignac number, because 449591889 - 2¹¹ = 449589841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (449591819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 694564 + ... + 695210.

It is an arithmetic number, because the mean of its divisors is an integer number (20139840).

Almost surely, 2^449591889 is an apocalyptic number.

It is an amenable number.

449591889 is a deficient number, since it is larger than the sum of its proper divisors (194882991).

449591889 is a wasteful number, since it uses less digits than its factorization.

449591889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909.

The product of its digits is 3732480, while the sum is 57.

The square root of 449591889 is about 21203.5819851269. The cubic root of 449591889 is about 766.0777035795.

The spelling of 449591889 in words is "four hundred forty-nine million, five hundred ninety-one thousand, eight hundred eighty-nine".