38982158721 has 81 divisors (see below), whose sum is σ = 64285774371. Its totient is φ = 22744972800.

The previous prime is 38982158707. The next prime is 38982158753. The reversal of 38982158721 is 12785128983.

The square root of 38982158721 is 197439.

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

38982158721 is a `hidden beast` number, since 38 + 9 + 8 + 2 + 1 + 587 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9444924225 + 29537234496 = 97185^2 + 171864^2 .

It is not a de Polignac number, because 38982158721 - 2⁹ = 38982158209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38982158221) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 201980001 + ... + 201980193.

Almost surely, 2^38982158721 is an apocalyptic number.

38982158721 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38982158721 is the 197439-th square number.

38982158721 is the 98720-th centered octagonal number.

It is an amenable number.

38982158721 is a deficient number, since it is larger than the sum of its proper divisors (25303615650).

38982158721 is a wasteful number, since it uses less digits than its factorization.

38982158721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 238 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 38982158721 in words is "thirty-eight billion, nine hundred eighty-two million, one hundred fifty-eight thousand, seven hundred twenty-one".