449228781 has 32 divisors (see below), whose sum is σ = 688870400. Its totient is φ = 289033920.

The previous prime is 449228779. The next prime is 449228807. The reversal of 449228781 is 187822944.

449228781 is a `hidden beast` number, since 4 + 492 + 2 + 87 + 81 = 666.

It is not a de Polignac number, because 449228781 - 2¹ = 449228779 is a prime.

It is a super-2 number, since 2×449228781² = 403612995357491922, 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 (449228701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 593055 + ... + 593811.

It is an arithmetic number, because the mean of its divisors is an integer number (21527200).

Almost surely, 2^449228781 is an apocalyptic number.

It is an amenable number.

449228781 is a deficient number, since it is larger than the sum of its proper divisors (239641619).

449228781 is a wasteful number, since it uses less digits than its factorization.

449228781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1500 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 449228781 is about 21195.0178343874. The cubic root of 449228781 is about 765.8714099238.

The spelling of 449228781 in words is "four hundred forty-nine million, two hundred twenty-eight thousand, seven hundred eighty-one".