40043020344 has 16 divisors (see below), whose sum is σ = 100107550920. Its totient is φ = 13347673440.

The previous prime is 40043020321. The next prime is 40043020349. The reversal of 40043020344 is 44302034004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 1668459181 = 40043020344 / (4 + 0 + 0 + 4 + 3 + 0 + 2 + 0 + 3 + 4 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40043020349) 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, 834229567 + ... + 834229614.

Almost surely, 2^40043020344 is an apocalyptic number.

It is an amenable number.

40043020344 is an abundant number, since it is smaller than the sum of its proper divisors (60064530576).

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

40043020344 is a wasteful number, since it uses less digits than its factorization.

40043020344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668459190 (or 1668459186 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 40043020344 its reverse (44302034004), we get a palindrome (84345054348).

The spelling of 40043020344 in words is "forty billion, forty-three million, twenty thousand, three hundred forty-four".