289778449 has 8 divisors (see below), whose sum is σ = 305315712. Its totient is φ = 274486080.

The previous prime is 289778407. The next prime is 289778471. The reversal of 289778449 is 944877982.

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 289778449 - 2¹¹ = 289776401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289778393 and 289778402.

It is not an unprimeable number, because it can be changed into a prime (289775449) 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, 58792 + ... + 63529.

It is an arithmetic number, because the mean of its divisors is an integer number (38164464).

Almost surely, 2^289778449 is an apocalyptic number.

It is an amenable number.

289778449 is a deficient number, since it is larger than the sum of its proper divisors (15537263).

289778449 is a wasteful number, since it uses less digits than its factorization.

289778449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122447.

The product of its digits is 8128512, while the sum is 58.

The square root of 289778449 is about 17022.8801617118. The cubic root of 289778449 is about 661.7419921421.

The spelling of 289778449 in words is "two hundred eighty-nine million, seven hundred seventy-eight thousand, four hundred forty-nine".