43242240420 has 60 divisors (see below), whose sum is σ = 135652514844. Its totient is φ = 11531263680.

The previous prime is 43242240413. The next prime is 43242240427. The reversal of 43242240420 is 2404224234.

43242240420 is a `hidden beast` number, since 432 + 4 + 224 + 0 + 4 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (43242240413) and next prime (43242240427).

It can be written as a sum of positive squares in 2 ways, for example, as 10530453924 + 32711786496 = 102618^2 + 180864^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is not an unprimeable number, because it can be changed into a prime (43242240427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13344751 + ... + 13347990.

Almost surely, 2^43242240420 is an apocalyptic number.

It is an amenable number.

43242240420 is an abundant number, since it is smaller than the sum of its proper divisors (92410274424).

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

43242240420 is a wasteful number, since it uses less digits than its factorization.

43242240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26692762 (or 26692751 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 43242240420 its reverse (2404224234), we get a palindrome (45646464654).

The spelling of 43242240420 in words is "forty-three billion, two hundred forty-two million, two hundred forty thousand, four hundred twenty".