40403133440 has 44 divisors (see below), whose sum is σ = 96920185116. Its totient is φ = 16161251328.

The previous prime is 40403133437. The next prime is 40403133457. The reversal of 40403133440 is 4433130404.

It can be written as a sum of positive squares in 2 ways, for example, as 7459431424 + 32943702016 = 86368^2 + 181504^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3940499 + ... + 3950738.

Almost surely, 2^40403133440 is an apocalyptic number.

40403133440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40403133440 is an abundant number, since it is smaller than the sum of its proper divisors (56517051676).

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

40403133440 is an equidigital number, since it uses as much as digits as its factorization.

40403133440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891262 (or 7891244 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 40403133440 its reverse (4433130404), we get a palindrome (44836263844).

The spelling of 40403133440 in words is "forty billion, four hundred three million, one hundred thirty-three thousand, four hundred forty".