40430440 has 32 divisors (see below), whose sum is σ = 91163880. Its totient is φ = 16137472.

The previous prime is 40430419. The next prime is 40430447. The reversal of 40430440 is 4403404.

40430440 is nontrivially palindromic in base 7.

40430440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 40018276 + 412164 = 6326^2 + 642^2 .

It is not an unprimeable number, because it can be changed into a prime (40430447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26334 + ... + 27826.

Almost surely, 2^40430440 is an apocalyptic number.

40430440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40430440 is an abundant number, since it is smaller than the sum of its proper divisors (50733440).

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

40430440 is a wasteful number, since it uses less digits than its factorization.

40430440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2177 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40430440 is about 6358.4935322763. The cubic root of 40430440 is about 343.2175518940.

Adding to 40430440 its reverse (4403404), we get a palindrome (44833844).

The spelling of 40430440 in words is "forty million, four hundred thirty thousand, four hundred forty".