40116813 has 16 divisors (see below), whose sum is σ = 59455296. Its totient is φ = 23853440.

The previous prime is 40116781. The next prime is 40116841. The reversal of 40116813 is 31861104.

It is a cyclic number.

It is not a de Polignac number, because 40116813 - 2⁵ = 40116781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40116613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9720 + ... + 13217.

It is an arithmetic number, because the mean of its divisors is an integer number (3715956).

Almost surely, 2^40116813 is an apocalyptic number.

It is an amenable number.

40116813 is a deficient number, since it is larger than the sum of its proper divisors (19338483).

40116813 is a wasteful number, since it uses less digits than its factorization.

40116813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23004.

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

The square root of 40116813 is about 6333.7834664598. The cubic root of 40116813 is about 342.3277781564.

Adding to 40116813 its reverse (31861104), we get a palindrome (71977917).

The spelling of 40116813 in words is "forty million, one hundred sixteen thousand, eight hundred thirteen".