289721338560 has 168 divisors, whose sum is σ = 1055139729696. Its totient is φ = 72714362880.

The previous prime is 289721338559. The next prime is 289721338573. The reversal of 289721338560 is 65833127982.

289721338560 is a `hidden beast` number, since 2 + 8 + 9 + 72 + 1 + 3 + 3 + 8 + 560 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 289721338497 and 289721338506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2909796 + ... + 3007715.

Almost surely, 2^289721338560 is an apocalyptic number.

289721338560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289721338560 is an abundant number, since it is smaller than the sum of its proper divisors (765418391136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289721338560 is a wasteful number, since it uses less digits than its factorization.

289721338560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5917551 (or 5917538 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 289721338560 in words is "two hundred eighty-nine billion, seven hundred twenty-one million, three hundred thirty-eight thousand, five hundred sixty".