40340443440 has 80 divisors (see below), whose sum is σ = 136424054016. Its totient is φ = 9779500800.

The previous prime is 40340443397. The next prime is 40340443441. The reversal of 40340443440 is 4434404304.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 40340443398 and 40340443407.

It is not an unprimeable number, because it can be changed into a prime (40340443441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7637596 + ... + 7642875.

Almost surely, 2^40340443440 is an apocalyptic number.

40340443440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40340443440 is an abundant number, since it is smaller than the sum of its proper divisors (96083610576).

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

40340443440 is a wasteful number, since it uses less digits than its factorization.

40340443440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15280498 (or 15280492 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 30.

Adding to 40340443440 its reverse (4434404304), we get a palindrome (44774847744).

The spelling of 40340443440 in words is "forty billion, three hundred forty million, four hundred forty-three thousand, four hundred forty".