38889023209 has 3 divisors (see below), whose sum is σ = 38889220413. Its totient is φ = 38888826006.

The previous prime is 38889023203. The next prime is 38889023219. The reversal of 38889023209 is 90232098883.

The square root of 38889023209 is 197203.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 38889023209 - 2¹³ = 38889015017 is a prime.

It is a super-2 number, since 2×38889023209² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38889023203) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 98602 + ... + 295804.

It is an arithmetic number, because the mean of its divisors is an integer number (12963073471).

Almost surely, 2^38889023209 is an apocalyptic number.

38889023209 is the 197203-rd square number.

38889023209 is the 98602-nd centered octagonal number.

It is an amenable number.

38889023209 is a deficient number, since it is larger than the sum of its proper divisors (197204).

38889023209 is an frugal number, since it uses more digits than its factorization.

38889023209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394406 (or 197203 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 38889023209 in words is "thirty-eight billion, eight hundred eighty-nine million, twenty-three thousand, two hundred nine".