449138851 has 24 divisors (see below), whose sum is σ = 532649040. Its totient is φ = 377540352.

The previous prime is 449138843. The next prime is 449138867. The reversal of 449138851 is 158831944.

It is not a de Polignac number, because 449138851 - 2³ = 449138843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 449138798 and 449138807.

It is not an unprimeable number, because it can be changed into a prime (449138831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1097935 + ... + 1098343.

It is an arithmetic number, because the mean of its divisors is an integer number (22193710).

Almost surely, 2^449138851 is an apocalyptic number.

449138851 is a deficient number, since it is larger than the sum of its proper divisors (83510189).

449138851 is a wasteful number, since it uses less digits than its factorization.

449138851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 796 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 449138851 is about 21192.8962390703. The cubic root of 449138851 is about 765.8203005446.

The spelling of 449138851 in words is "four hundred forty-nine million, one hundred thirty-eight thousand, eight hundred fifty-one".