23208389649 has 15 divisors (see below), whose sum is σ = 34671371097. Its totient is φ = 15471345708.

The previous prime is 23208389641. The next prime is 23208389663. The reversal of 23208389649 is 94698380232.

It is a happy number.

The square root of 23208389649 is 152343.

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

It is not a de Polignac number, because 23208389649 - 2³ = 23208389641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23208389595 and 23208389604.

It is not an unprimeable number, because it can be changed into a prime (23208389641) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1362624 + ... + 1379550.

Almost surely, 2^23208389649 is an apocalyptic number.

23208389649 is the 152343-rd square number.

23208389649 is the 76172-nd centered octagonal number.

It is an amenable number.

23208389649 is a deficient number, since it is larger than the sum of its proper divisors (11462981448).

23208389649 is an frugal number, since it uses more digits than its factorization.

23208389649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33866 (or 16930 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 23208389649 in words is "twenty-three billion, two hundred eight million, three hundred eighty-nine thousand, six hundred forty-nine".