43712136 has 80 divisors (see below), whose sum is σ = 131877900. Its totient is φ = 13447296.

The previous prime is 43712131. The next prime is 43712147. The reversal of 43712136 is 63121734.

It can be written as a sum of positive squares in 2 ways, for example, as 43639236 + 72900 = 6606^2 + 270^2 .

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

It is not an unprimeable number, because it can be changed into a prime (43712131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5830 + ... + 11018.

Almost surely, 2^43712136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43712136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65938950).

43712136 is an abundant number, since it is smaller than the sum of its proper divisors (88165764).

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

43712136 is a wasteful number, since it uses less digits than its factorization.

43712136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220 (or 5207 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 43712136 is about 6611.5154087395. The cubic root of 43712136 is about 352.2632543419.

The spelling of 43712136 in words is "forty-three million, seven hundred twelve thousand, one hundred thirty-six".