43136820 has 192 divisors, whose sum is σ = 147087360. Its totient is φ = 10450944.

The previous prime is 43136801. The next prime is 43136827. The reversal of 43136820 is 2863134.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43136827) 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, 339597 + ... + 339723.

It is an arithmetic number, because the mean of its divisors is an integer number (766080).

Almost surely, 2^43136820 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 43136820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73543680).

43136820 is an abundant number, since it is smaller than the sum of its proper divisors (103950540).

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

43136820 is a wasteful number, since it uses less digits than its factorization.

43136820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 43136820 is about 6567.8626660429. The cubic root of 43136820 is about 350.7109900907.

Adding to 43136820 its reverse (2863134), we get a palindrome (45999954).

It can be divided in two parts, 43136 and 820, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 43136820 in words is "forty-three million, one hundred thirty-six thousand, eight hundred twenty".