40808313 has 64 divisors (see below), whose sum is σ = 78865920. Its totient is φ = 20238336.

The previous prime is 40808303. The next prime is 40808321. The reversal of 40808313 is 31380804.

It is not a de Polignac number, because 40808313 - 2⁴ = 40808297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40808303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41281 + ... + 42257.

It is an arithmetic number, because the mean of its divisors is an integer number (1232280).

Almost surely, 2^40808313 is an apocalyptic number.

It is an amenable number.

40808313 is a deficient number, since it is larger than the sum of its proper divisors (38057607).

40808313 is a wasteful number, since it uses less digits than its factorization.

40808313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 40808313 is about 6388.1384612421. The cubic root of 40808313 is about 344.2835035576.

The spelling of 40808313 in words is "forty million, eight hundred eight thousand, three hundred thirteen".