38385821929 has 27 divisors (see below), whose sum is σ = 48374419653. Its totient is φ = 30357093312.

The previous prime is 38385821927. The next prime is 38385821941. The reversal of 38385821929 is 92912858383.

The square root of 38385821929 is 195923.

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

It can be written as a sum of positive squares in 4 ways, for example, as 23584666329 + 14801155600 = 153573^2 + 121660^2 .

It is not a de Polignac number, because 38385821929 - 2¹ = 38385821927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38385821927) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17827917 + ... + 17830069.

Almost surely, 2^38385821929 is an apocalyptic number.

38385821929 is the 195923-rd square number.

38385821929 is the 97962-nd centered octagonal number.

It is an amenable number.

38385821929 is a deficient number, since it is larger than the sum of its proper divisors (9988597724).

38385821929 is an frugal number, since it uses more digits than its factorization.

38385821929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346 (or 2173 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 58.

The spelling of 38385821929 in words is "thirty-eight billion, three hundred eighty-five million, eight hundred twenty-one thousand, nine hundred twenty-nine".