40118729 has 16 divisors (see below), whose sum is σ = 47008128. Its totient is φ = 33530112.

The previous prime is 40118719. The next prime is 40118731. The reversal of 40118729 is 92781104.

It is not a de Polignac number, because 40118729 - 2⁴ = 40118713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40118695 and 40118704.

It is not an unprimeable number, because it can be changed into a prime (40118719) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 52619 + ... + 53375.

It is an arithmetic number, because the mean of its divisors is an integer number (2938008).

Almost surely, 2^40118729 is an apocalyptic number.

It is an amenable number.

40118729 is a deficient number, since it is larger than the sum of its proper divisors (6889399).

40118729 is a wasteful number, since it uses less digits than its factorization.

40118729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 40118729 is about 6333.9347170617. The cubic root of 40118729 is about 342.3332279877. Note that the first 3 decimals are identical.

The spelling of 40118729 in words is "forty million, one hundred eighteen thousand, seven hundred twenty-nine".