40335729 has 16 divisors (see below), whose sum is σ = 62773248. Its totient is φ = 22558032.

The previous prime is 40335709. The next prime is 40335731. The reversal of 40335729 is 92753304.

It is a happy number.

It is not a de Polignac number, because 40335729 - 2⁵ = 40335697 is a prime.

It is a super-2 number, since 2×40335729² = 3253942067922882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40335729.

It is not an unprimeable number, because it can be changed into a prime (40335709) 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, 19447 + ... + 21420.

It is an arithmetic number, because the mean of its divisors is an integer number (3923328).

Almost surely, 2^40335729 is an apocalyptic number.

It is an amenable number.

40335729 is a deficient number, since it is larger than the sum of its proper divisors (22437519).

40335729 is a wasteful number, since it uses less digits than its factorization.

40335729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40924.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 40335729 is about 6351.0415681209. The cubic root of 40335729 is about 342.9493390202.

The spelling of 40335729 in words is "forty million, three hundred thirty-five thousand, seven hundred twenty-nine".