40332440 has 32 divisors (see below), whose sum is σ = 95526000. Its totient is φ = 15283584.

The previous prime is 40332433. The next prime is 40332443. The reversal of 40332440 is 4423304.

It is a happy number.

40332440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40332443) 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, 25775 + ... + 27294.

Almost surely, 2^40332440 is an apocalyptic number.

40332440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40332440 is an abundant number, since it is smaller than the sum of its proper divisors (55193560).

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

40332440 is a wasteful number, since it uses less digits than its factorization.

40332440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53099 (or 53095 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40332440 is about 6350.7826289364. The cubic root of 40332440 is about 342.9400173339.

Adding to 40332440 its reverse (4423304), we get a palindrome (44755744).

The spelling of 40332440 in words is "forty million, three hundred thirty-two thousand, four hundred forty".