40352440 has 32 divisors (see below), whose sum is σ = 91280880. Its totient is φ = 16054272.

The previous prime is 40352393. The next prime is 40352449. The reversal of 40352440 is 4425304.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40352449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107 + ... + 10333.

Almost surely, 2^40352440 is an apocalyptic number.

40352440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40352440 is an abundant number, since it is smaller than the sum of its proper divisors (50928440).

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

40352440 is a wasteful number, since it uses less digits than its factorization.

40352440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5431 (or 5427 counting only the distinct ones).

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

The square root of 40352440 is about 6352.3570428621. The cubic root of 40352440 is about 342.9966935227.

Adding to 40352440 its reverse (4425304), we get a palindrome (44777744).

The spelling of 40352440 in words is "forty million, three hundred fifty-two thousand, four hundred forty".