39838962409 has 27 divisors (see below), whose sum is σ = 43267149687. Its totient is φ = 36674751168.

The previous prime is 39838962407. The next prime is 39838962419. The reversal of 39838962409 is 90426983893.

The square root of 39838962409 is 199597.

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., 31016493225 + 8822469184 = 176115^2 + 93928^2 .

It is not a de Polignac number, because 39838962409 - 2¹ = 39838962407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39838962407) 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 26 ways as a sum of consecutive naturals, for example, 200195692 + ... + 200195890.

Almost surely, 2^39838962409 is an apocalyptic number.

39838962409 is the 199597-th square number.

39838962409 is the 99799-th centered octagonal number.

It is an amenable number.

39838962409 is a deficient number, since it is larger than the sum of its proper divisors (3428187278).

39838962409 is an frugal number, since it uses more digits than its factorization.

39838962409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 61.

The spelling of 39838962409 in words is "thirty-nine billion, eight hundred thirty-eight million, nine hundred sixty-two thousand, four hundred nine".