40620729 has 8 divisors (see below), whose sum is σ = 54220320. Its totient is φ = 27050816.

The previous prime is 40620721. The next prime is 40620739. The reversal of 40620729 is 92702604.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40620729 - 2³ = 40620721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40620696 and 40620705.

It is not an unprimeable number, because it can be changed into a prime (40620721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3999 + ... + 9860.

It is an arithmetic number, because the mean of its divisors is an integer number (6777540).

Almost surely, 2^40620729 is an apocalyptic number.

It is an amenable number.

40620729 is a deficient number, since it is larger than the sum of its proper divisors (13599591).

40620729 is a wasteful number, since it uses less digits than its factorization.

40620729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14839.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 40620729 is about 6373.4393383792. The cubic root of 40620729 is about 343.7551693327.

The spelling of 40620729 in words is "forty million, six hundred twenty thousand, seven hundred twenty-nine".