289446391 has 8 divisors (see below), whose sum is σ = 311928624. Its totient is φ = 266995200.

The previous prime is 289446371. The next prime is 289446397. The reversal of 289446391 is 193644982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289446391 - 2⁵ = 289446359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289446397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13860 + ... + 27766.

It is an arithmetic number, because the mean of its divisors is an integer number (38991078).

Almost surely, 2^289446391 is an apocalyptic number.

289446391 is a deficient number, since it is larger than the sum of its proper divisors (22482233).

289446391 is a wasteful number, since it uses less digits than its factorization.

289446391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15521.

The product of its digits is 373248, while the sum is 46.

The square root of 289446391 is about 17013.1240811322. The cubic root of 289446391 is about 661.4891314837.

The spelling of 289446391 in words is "two hundred eighty-nine million, four hundred forty-six thousand, three hundred ninety-one".