40808736 has 36 divisors (see below), whose sum is σ = 116050662. Its totient is φ = 13602816.

The previous prime is 40808723. The next prime is 40808753. The reversal of 40808736 is 63780804.

It can be written as a sum of positive squares in only one way, i.e., 34152336 + 6656400 = 5844^2 + 2580^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40808736.

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 5 ways as a sum of consecutive naturals, for example, 70561 + ... + 71136.

Almost surely, 2^40808736 is an apocalyptic number.

It is an amenable number.

40808736 is an abundant number, since it is smaller than the sum of its proper divisors (75241926).

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

40808736 is a wasteful number, since it uses less digits than its factorization.

40808736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141713 (or 141702 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 40808736 is about 6388.1715693929. The cubic root of 40808736 is about 344.2846931144.

The spelling of 40808736 in words is "forty million, eight hundred eight thousand, seven hundred thirty-six".