38630723209 has 15 divisors (see below), whose sum is σ = 41885852753. Its totient is φ = 35628467784.

The previous prime is 38630723179. The next prime is 38630723231. The reversal of 38630723209 is 90232703683.

The square root of 38630723209 is 196547.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19153729609 + 19476993600 = 138397^2 + 139560^2 .

It is not a de Polignac number, because 38630723209 - 2³⁵ = 4270984841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38630723269) 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, 33215862 + ... + 33217024.

Almost surely, 2^38630723209 is an apocalyptic number.

38630723209 is the 196547-th square number.

38630723209 is the 98274-th centered octagonal number.

It is an amenable number.

38630723209 is a deficient number, since it is larger than the sum of its proper divisors (3255129544).

38630723209 is an frugal number, since it uses more digits than its factorization.

38630723209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 38630723209 in words is "thirty-eight billion, six hundred thirty million, seven hundred twenty-three thousand, two hundred nine".