289926668 has 6 divisors (see below), whose sum is σ = 507371676. Its totient is φ = 144963332.

The previous prime is 289926647. The next prime is 289926671. The reversal of 289926668 is 866629982.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36240830 + ... + 36240837.

It is an arithmetic number, because the mean of its divisors is an integer number (84561946).

Almost surely, 2^289926668 is an apocalyptic number.

It is an amenable number.

289926668 is a deficient number, since it is larger than the sum of its proper divisors (217445008).

289926668 is a wasteful number, since it uses less digits than its factorization.

289926668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72481671 (or 72481669 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 56.

The square root of 289926668 is about 17027.2331281392. The cubic root of 289926668 is about 661.8547978835.

The spelling of 289926668 in words is "two hundred eighty-nine million, nine hundred twenty-six thousand, six hundred sixty-eight".