449732978838 has 240 divisors, whose sum is σ = 1225147215600. Its totient is φ = 122396883840.

The previous prime is 449732978809. The next prime is 449732978867. The reversal of 449732978838 is 838879237944.

449732978838 is a `hidden beast` number, since 4 + 497 + 3 + 29 + 7 + 88 + 38 = 666.

It is an interprime number because it is at equal distance from previous prime (449732978809) and next prime (449732978867).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 9404713 + ... + 9452411.

It is an arithmetic number, because the mean of its divisors is an integer number (5104780065).

Almost surely, 2^449732978838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 449732978838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612573607800).

449732978838 is an abundant number, since it is smaller than the sum of its proper divisors (775414236762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

449732978838 is a wasteful number, since it uses less digits than its factorization.

449732978838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47785 (or 47765 counting only the distinct ones).

The product of its digits is 585252864, while the sum is 72.

The spelling of 449732978838 in words is "four hundred forty-nine billion, seven hundred thirty-two million, nine hundred seventy-eight thousand, eight hundred thirty-eight".