40521344 has 32 divisors (see below), whose sum is σ = 81656100. Its totient is φ = 20027392.

The previous prime is 40521337. The next prime is 40521361. The reversal of 40521344 is 44312504.

It can be written as a sum of positive squares in 2 ways, for example, as 34951744 + 5569600 = 5912^2 + 2360^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9614 + ... + 13170.

Almost surely, 2^40521344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40521344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40828050).

40521344 is an abundant number, since it is smaller than the sum of its proper divisors (41134756).

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

40521344 is an equidigital number, since it uses as much as digits as its factorization.

40521344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660 (or 3648 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40521344 is about 6365.6377528100. The cubic root of 40521344 is about 343.4745900251.

Adding to 40521344 its reverse (44312504), we get a palindrome (84833848).

The spelling of 40521344 in words is "forty million, five hundred twenty-one thousand, three hundred forty-four".