38538793969 has 9 divisors (see below), whose sum is σ = 41734120449. Its totient is φ = 35571915600.

The previous prime is 38538793961. The next prime is 38538793991. The reversal of 38538793969 is 96939783583.

The square root of 38538793969 is 196313.

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 20499080625 + 18039713344 = 143175^2 + 134312^2 .

It is not a de Polignac number, because 38538793969 - 2³ = 38538793961 is a prime.

It is a super-2 number, since 2×38538793969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38538793898 and 38538793907.

It is not an unprimeable number, because it can be changed into a prime (38538793961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2544519 + ... + 2559619.

Almost surely, 2^38538793969 is an apocalyptic number.

38538793969 is the 196313-rd square number.

38538793969 is the 98157-th centered octagonal number.

It is an amenable number.

38538793969 is a deficient number, since it is larger than the sum of its proper divisors (3195326480).

38538793969 is an frugal number, since it uses more digits than its factorization.

38538793969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30228 (or 15114 counting only the distinct ones).

The product of its digits is 264539520, while the sum is 70.

The spelling of 38538793969 in words is "thirty-eight billion, five hundred thirty-eight million, seven hundred ninety-three thousand, nine hundred sixty-nine".