43138116 has 96 divisors (see below), whose sum is σ = 130887680. Its totient is φ = 12029472.

The previous prime is 43138111. The next prime is 43138127. The reversal of 43138116 is 61183134.

43138116 is a nontrivial binomial coefficient, being equal to C(9289, 2).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 43138116.

It is not an unprimeable number, because it can be changed into a prime (43138111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31845 + ... + 33171.

Almost surely, 2^43138116 is an apocalyptic number.

43138116 is the 9288-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43138116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65443840).

43138116 is an abundant number, since it is smaller than the sum of its proper divisors (87749564).

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

43138116 is a wasteful number, since it uses less digits than its factorization.

43138116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1382 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 43138116 is about 6567.9613275354. The cubic root of 43138116 is about 350.7145023021.

It can be divided in two parts, 431381 and 16, that multiplied together give a palindrome (6902096).

The spelling of 43138116 in words is "forty-three million, one hundred thirty-eight thousand, one hundred sixteen".