289209485 has 8 divisors (see below), whose sum is σ = 347202456. Its totient is φ = 231266880.

The previous prime is 289209461. The next prime is 289209511. The reversal of 289209485 is 584902982.

It can be written as a sum of positive squares in 4 ways, for example, as 93741124 + 195468361 = 9682^2 + 13981^2 .

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

It is not a de Polignac number, because 289209485 - 2²⁶ = 222100621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475 + ... + 24095.

It is an arithmetic number, because the mean of its divisors is an integer number (43400307).

Almost surely, 2^289209485 is an apocalyptic number.

It is an amenable number.

289209485 is a deficient number, since it is larger than the sum of its proper divisors (57992971).

289209485 is a wasteful number, since it uses less digits than its factorization.

289209485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25183.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 289209485 is about 17006.1602074072. The cubic root of 289209485 is about 661.3086104116.

The spelling of 289209485 in words is "two hundred eighty-nine million, two hundred nine thousand, four hundred eighty-five".