38187803889 has 15 divisors (see below), whose sum is σ = 57048606043. Its totient is φ = 25457363424.

The previous prime is 38187803881. The next prime is 38187803893. The reversal of 38187803889 is 98830878183.

It is a happy number.

The square root of 38187803889 is 195417.

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

It can be written as a sum of positive squares in only one way, i.e., 9899255025 + 28288548864 = 99495^2 + 168192^2 .

It is not a de Polignac number, because 38187803889 - 2³ = 38187803881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38187803881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1747897 + ... + 1769609.

Almost surely, 2^38187803889 is an apocalyptic number.

38187803889 is the 195417-th square number.

38187803889 is the 97709-th centered octagonal number.

It is an amenable number.

38187803889 is a deficient number, since it is larger than the sum of its proper divisors (18860802154).

38187803889 is an frugal number, since it uses more digits than its factorization.

38187803889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43438 (or 21716 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The spelling of 38187803889 in words is "thirty-eight billion, one hundred eighty-seven million, eight hundred three thousand, eight hundred eighty-nine".