38725729 has 15 divisors (see below), whose sum is σ = 45535857. Its totient is φ = 32932116.

The previous prime is 38725691. The next prime is 38725733. The reversal of 38725729 is 92752783.

The square root of 38725729 is 6223.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 38725729 - 2⁹ = 38725217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38725529) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 304864 + ... + 304990.

Almost surely, 2^38725729 is an apocalyptic number.

38725729 is the 6223-rd square number.

38725729 is the 3112-nd centered octagonal number.

It is an amenable number.

38725729 is a deficient number, since it is larger than the sum of its proper divisors (6810128).

38725729 is an frugal number, since it uses more digits than its factorization.

38725729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 134 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The cubic root of 38725729 is about 338.3243068011.

The spelling of 38725729 in words is "thirty-eight million, seven hundred twenty-five thousand, seven hundred twenty-nine".