449978438 has 32 divisors (see below), whose sum is σ = 832109376. Its totient is φ = 177717888.

The previous prime is 449978407. The next prime is 449978447. The reversal of 449978438 is 834879944.

It is a super-3 number, since 3×449978438³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131720 + ... + 135092.

It is an arithmetic number, because the mean of its divisors is an integer number (26003418).

Almost surely, 2^449978438 is an apocalyptic number.

449978438 is a deficient number, since it is larger than the sum of its proper divisors (382130938).

449978438 is a wasteful number, since it uses less digits than its factorization.

449978438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128.

The product of its digits is 6967296, while the sum is 56.

The square root of 449978438 is about 21212.6952082945. The cubic root of 449978438 is about 766.2971928173.

It can be divided in two parts, 44997 and 8438, that added together give a palindrome (53435).

The spelling of 449978438 in words is "four hundred forty-nine million, nine hundred seventy-eight thousand, four hundred thirty-eight".