40809012 has 48 divisors (see below), whose sum is σ = 97249152. Its totient is φ = 13317120.

The previous prime is 40808987. The next prime is 40809029. The reversal of 40809012 is 21090804.

40809012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×40809012⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169212 + ... + 169452.

It is an arithmetic number, because the mean of its divisors is an integer number (2026024).

Almost surely, 2^40809012 is an apocalyptic number.

It is an amenable number.

40809012 is an abundant number, since it is smaller than the sum of its proper divisors (56440140).

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

40809012 is a wasteful number, since it uses less digits than its factorization.

40809012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 40809012 is about 6388.1931717818. The cubic root of 40809012 is about 344.2854692747.

Adding to 40809012 its reverse (21090804), we get a palindrome (61899816).

The spelling of 40809012 in words is "forty million, eight hundred nine thousand, twelve".