43426281738 has 128 divisors (see below), whose sum is σ = 108674187264. Its totient is φ = 11296454400.

The previous prime is 43426281733. The next prime is 43426281749. The reversal of 43426281738 is 83718262434.

It is not an unprimeable number, because it can be changed into a prime (43426281733) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1814820 + ... + 1838592.

It is an arithmetic number, because the mean of its divisors is an integer number (849017088).

Almost surely, 2^43426281738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43426281738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54337093632).

43426281738 is an abundant number, since it is smaller than the sum of its proper divisors (65247905526).

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

43426281738 is a wasteful number, since it uses less digits than its factorization.

43426281738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23900.

The product of its digits is 1548288, while the sum is 48.

The spelling of 43426281738 in words is "forty-three billion, four hundred twenty-six million, two hundred eighty-one thousand, seven hundred thirty-eight".