43838420 has 24 divisors (see below), whose sum is σ = 93799944. Its totient is φ = 17204096.

The previous prime is 43838419. The next prime is 43838423. The reversal of 43838420 is 2483834.

It can be written as a sum of positive squares in 4 ways, for example, as 10982596 + 32855824 = 3314^2 + 5732^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43838423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19619 + ... + 21738.

It is an arithmetic number, because the mean of its divisors is an integer number (3908331).

Almost surely, 2^43838420 is an apocalyptic number.

It is an amenable number.

43838420 is an abundant number, since it is smaller than the sum of its proper divisors (49961524).

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

43838420 is a wasteful number, since it uses less digits than its factorization.

43838420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41419 (or 41417 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 43838420 is about 6621.0588277103. The cubic root of 43838420 is about 352.6021567335.

The spelling of 43838420 in words is "forty-three million, eight hundred thirty-eight thousand, four hundred twenty".