40243430440 has 16 divisors (see below), whose sum is σ = 90547718580. Its totient is φ = 16097372160.

The previous prime is 40243430431. The next prime is 40243430449. The reversal of 40243430440 is 4403434204.

It is an interprime number because it is at equal distance from previous prime (40243430431) and next prime (40243430449).

It can be written as a sum of positive squares in 2 ways, for example, as 40241162404 + 2268036 = 200602^2 + 1506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40243430399 and 40243430408.

It is not an unprimeable number, because it can be changed into a prime (40243430449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503042841 + ... + 503042920.

Almost surely, 2^40243430440 is an apocalyptic number.

40243430440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40243430440 is an abundant number, since it is smaller than the sum of its proper divisors (50304288140).

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

40243430440 is a wasteful number, since it uses less digits than its factorization.

40243430440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006085772 (or 1006085768 counting only the distinct ones).

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

Adding to 40243430440 its reverse (4403434204), we get a palindrome (44646864644).

The spelling of 40243430440 in words is "forty billion, two hundred forty-three million, four hundred thirty thousand, four hundred forty".