43440420 has 24 divisors (see below), whose sum is σ = 121633344. Its totient is φ = 11584096.

The previous prime is 43440413. The next prime is 43440433. The reversal of 43440420 is 2404434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361944 + ... + 362063.

It is an arithmetic number, because the mean of its divisors is an integer number (5068056).

Almost surely, 2^43440420 is an apocalyptic number.

It is an amenable number.

43440420 is an abundant number, since it is smaller than the sum of its proper divisors (78192924).

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

43440420 is a wasteful number, since it uses less digits than its factorization.

43440420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724019 (or 724017 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 43440420 is about 6590.9346833359. The cubic root of 43440420 is about 351.5318436281.

Adding to 43440420 its reverse (2404434), we get a palindrome (45844854).

The spelling of 43440420 in words is "forty-three million, four hundred forty thousand, four hundred twenty".