43340420 has 12 divisors (see below), whose sum is σ = 91014924. Its totient is φ = 17336160.

The previous prime is 43340417. The next prime is 43340477. The reversal of 43340420 is 2404334.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5098564 + 38241856 = 2258^2 + 6184^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2167021 = 43340420 / (4 + 3 + 3 + 4 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 43340392 and 43340401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083491 + ... + 1083530.

It is an arithmetic number, because the mean of its divisors is an integer number (7584577).

Almost surely, 2^43340420 is an apocalyptic number.

It is an amenable number.

43340420 is an abundant number, since it is smaller than the sum of its proper divisors (47674504).

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

43340420 is a wasteful number, since it uses less digits than its factorization.

43340420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167030 (or 2167028 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 43340420 is about 6583.3441350122. The cubic root of 43340420 is about 351.2618938657.

Adding to 43340420 its reverse (2404334), we get a palindrome (45744754).

The spelling of 43340420 in words is "forty-three million, three hundred forty thousand, four hundred twenty".