40532440 has 64 divisors (see below), whose sum is σ = 102513600. Its totient is φ = 14310912.

The previous prime is 40532423. The next prime is 40532449. The reversal of 40532440 is 4423504.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40532449) 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, 10266 + ... + 13654.

It is an arithmetic number, because the mean of its divisors is an integer number (1601775).

Almost surely, 2^40532440 is an apocalyptic number.

40532440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40532440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51256800).

40532440 is an abundant number, since it is smaller than the sum of its proper divisors (61981160).

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

40532440 is a wasteful number, since it uses less digits than its factorization.

40532440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436 (or 3432 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40532440 is about 6366.5092476176. The cubic root of 40532440 is about 343.5059384936.

Adding to 40532440 its reverse (4423504), we get a palindrome (44955944).

The spelling of 40532440 in words is "forty million, five hundred thirty-two thousand, four hundred forty".