40581012 has 24 divisors (see below), whose sum is σ = 95530176. Its totient is φ = 13406848.

The previous prime is 40581011. The next prime is 40581019. The reversal of 40581012 is 21018504.

It is a self number, because there is not a number n which added to its sum of digits gives 40581012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40581011) 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, 13608 + ... + 16319.

It is an arithmetic number, because the mean of its divisors is an integer number (3980424).

Almost surely, 2^40581012 is an apocalyptic number.

It is an amenable number.

40581012 is an abundant number, since it is smaller than the sum of its proper divisors (54949164).

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

40581012 is a wasteful number, since it uses less digits than its factorization.

40581012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30047 (or 30045 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 40581012 is about 6370.3227547747. The cubic root of 40581012 is about 343.6430970276.

Adding to 40581012 its reverse (21018504), we get a palindrome (61599516).

The spelling of 40581012 in words is "forty million, five hundred eighty-one thousand, twelve".