40431435440 has 80 divisors (see below), whose sum is σ = 103953766176. Its totient is φ = 14500915200.

The previous prime is 40431435419. The next prime is 40431435511. The reversal of 40431435440 is 4453413404.

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

It is a junction number, because it is equal to n+sod(n) for n = 40431435397 and 40431435406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250451 + ... + 378930.

Almost surely, 2^40431435440 is an apocalyptic number.

40431435440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40431435440 is an abundant number, since it is smaller than the sum of its proper divisors (63522330736).

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

40431435440 is a wasteful number, since it uses less digits than its factorization.

40431435440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629478 (or 629472 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 40431435440 its reverse (4453413404), we get a palindrome (44884848844).

The spelling of 40431435440 in words is "forty billion, four hundred thirty-one million, four hundred thirty-five thousand, four hundred forty".