43449408378 has 12 divisors (see below), whose sum is σ = 94140384858. Its totient is φ = 14483136120.

The previous prime is 43449408377. The next prime is 43449408403. The reversal of 43449408378 is 87380494434.

43449408378 is a `hidden beast` number, since 4 + 3 + 4 + 494 + 0 + 83 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40764821409 + 2684586969 = 201903^2 + 51813^2 .

It is not an unprimeable number, because it can be changed into a prime (43449408377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1206927993 + ... + 1206928028.

Almost surely, 2^43449408378 is an apocalyptic number.

43449408378 is an abundant number, since it is smaller than the sum of its proper divisors (50690976480).

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

43449408378 is a wasteful number, since it uses less digits than its factorization.

43449408378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413856029 (or 2413856026 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 43449408378 in words is "forty-three billion, four hundred forty-nine million, four hundred eight thousand, three hundred seventy-eight".