43806138 has 16 divisors (see below), whose sum is σ = 88282656. Its totient is φ = 14490320.

The previous prime is 43806107. The next prime is 43806151. The reversal of 43806138 is 83160834.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 43806099 and 43806108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27081 + ... + 28652.

It is an arithmetic number, because the mean of its divisors is an integer number (5517666).

Almost surely, 2^43806138 is an apocalyptic number.

43806138 is an abundant number, since it is smaller than the sum of its proper divisors (44476518).

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

43806138 is a wasteful number, since it uses less digits than its factorization.

43806138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55869.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 43806138 is about 6618.6205511421. The cubic root of 43806138 is about 352.5155850461.

The spelling of 43806138 in words is "forty-three million, eight hundred six thousand, one hundred thirty-eight".