40243432420 has 12 divisors (see below), whose sum is σ = 84511208124. Its totient is φ = 16097372960.

The previous prime is 40243432417. The next prime is 40243432433. The reversal of 40243432420 is 2423434204.

It is a happy number.

40243432420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16367620096 + 23875812324 = 127936^2 + 154518^2 .

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, 1006085791 + ... + 1006085830.

It is an arithmetic number, because the mean of its divisors is an integer number (7042600677).

Almost surely, 2^40243432420 is an apocalyptic number.

It is an amenable number.

40243432420 is an abundant number, since it is smaller than the sum of its proper divisors (44267775704).

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

40243432420 is a wasteful number, since it uses less digits than its factorization.

40243432420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012171630 (or 2012171628 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 40243432420 its reverse (2423434204), we get a palindrome (42666866624).

The spelling of 40243432420 in words is "forty billion, two hundred forty-three million, four hundred thirty-two thousand, four hundred twenty".