38968729 has 8 divisors (see below), whose sum is σ = 39502152. Its totient is φ = 38438400.

The previous prime is 38968703. The next prime is 38968747. The reversal of 38968729 is 92786983.

38968729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26543104 + 12425625 = 5152^2 + 3525^2 .

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 38968729 - 2⁵ = 38968697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38968759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35107 + ... + 36199.

It is an arithmetic number, because the mean of its divisors is an integer number (4937769).

Almost surely, 2^38968729 is an apocalyptic number.

It is an amenable number.

38968729 is a deficient number, since it is larger than the sum of its proper divisors (533423).

38968729 is a wasteful number, since it uses less digits than its factorization.

38968729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547.

The product of its digits is 1306368, while the sum is 52.

The square root of 38968729 is about 6242.4938125720. The cubic root of 38968729 is about 339.0304819688.

The spelling of 38968729 in words is "thirty-eight million, nine hundred sixty-eight thousand, seven hundred twenty-nine".