43201820 has 48 divisors (see below), whose sum is σ = 99671040. Its totient is φ = 15656256.

The previous prime is 43201819. The next prime is 43201859. The reversal of 43201820 is 2810234.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 43201792 and 43201801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6269 + ... + 11211.

It is an arithmetic number, because the mean of its divisors is an integer number (2076480).

Almost surely, 2^43201820 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 43201820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49835520).

43201820 is an abundant number, since it is smaller than the sum of its proper divisors (56469220).

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

43201820 is a wasteful number, since it uses less digits than its factorization.

43201820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994 (or 4992 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 43201820 is about 6572.8091406947. The cubic root of 43201820 is about 350.8870560277.

The spelling of 43201820 in words is "forty-three million, two hundred one thousand, eight hundred twenty".