289906005 has 16 divisors (see below), whose sum is σ = 464495040. Its totient is φ = 154401408.

The previous prime is 289906003. The next prime is 289906027. The reversal of 289906005 is 500609982.

It is a happy number.

It is not a de Polignac number, because 289906005 - 2¹ = 289906003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289906003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1992 + ... + 24161.

It is an arithmetic number, because the mean of its divisors is an integer number (29030940).

Almost surely, 2^289906005 is an apocalyptic number.

It is an amenable number.

289906005 is a deficient number, since it is larger than the sum of its proper divisors (174589035).

289906005 is a wasteful number, since it uses less digits than its factorization.

289906005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26900.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 289906005 is about 17026.6263540374. The cubic root of 289906005 is about 661.8390741021.

The spelling of 289906005 in words is "two hundred eighty-nine million, nine hundred six thousand, five".