43135638 has 64 divisors (see below), whose sum is σ = 106982400. Its totient is φ = 11290752.

The previous prime is 43135637. The next prime is 43135661. The reversal of 43135638 is 83653134.

It is a junction number, because it is equal to n+sod(n) for n = 43135599 and 43135608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43135633) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 108456 + ... + 108852.

It is an arithmetic number, because the mean of its divisors is an integer number (1671600).

Almost surely, 2^43135638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43135638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53491200).

43135638 is an abundant number, since it is smaller than the sum of its proper divisors (63846762).

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

43135638 is a wasteful number, since it uses less digits than its factorization.

43135638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its digits is 25920, while the sum is 33.

The square root of 43135638 is about 6567.7726818154. The cubic root of 43135638 is about 350.7077867625.

The spelling of 43135638 in words is "forty-three million, one hundred thirty-five thousand, six hundred thirty-eight".