40581380 has 96 divisors (see below), whose sum is σ = 105235200. Its totient is φ = 12873216.

The previous prime is 40581337. The next prime is 40581403. The reversal of 40581380 is 8318504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 687791 + ... + 687849.

It is an arithmetic number, because the mean of its divisors is an integer number (1096200).

Almost surely, 2^40581380 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 40581380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52617600).

40581380 is an abundant number, since it is smaller than the sum of its proper divisors (64653820).

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

40581380 is a wasteful number, since it uses less digits than its factorization.

40581380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 40581380 is about 6370.3516386460. The cubic root of 40581380 is about 343.6441357751.

Adding to 40581380 its reverse (8318504), we get a palindrome (48899884).

The spelling of 40581380 in words is "forty million, five hundred eighty-one thousand, three hundred eighty".