40405316 has 24 divisors (see below), whose sum is σ = 81303936. Its totient is φ = 17210880.

The previous prime is 40405237. The next prime is 40405331. The reversal of 40405316 is 61350404.

It is a happy number.

It is a super-2 number, since 2×40405316² = 3265179122119712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40405291 and 40405300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356 + ... + 8996.

It is an arithmetic number, because the mean of its divisors is an integer number (3387664).

Almost surely, 2^40405316 is an apocalyptic number.

It is an amenable number.

40405316 is an abundant number, since it is smaller than the sum of its proper divisors (40898620).

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

40405316 is a wasteful number, since it uses less digits than its factorization.

40405316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8819 (or 8817 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40405316 is about 6356.5176000700. The cubic root of 40405316 is about 343.1464438828.

The spelling of 40405316 in words is "forty million, four hundred five thousand, three hundred sixteen".