289866445 has 16 divisors (see below), whose sum is σ = 380956608. Its totient is φ = 209981440.

The previous prime is 289866407. The next prime is 289866457. The reversal of 289866445 is 544668982.

It is not a de Polignac number, because 289866445 - 2¹¹ = 289864397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289866392 and 289866401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3882 + ... + 24388.

It is an arithmetic number, because the mean of its divisors is an integer number (23809788).

Almost surely, 2^289866445 is an apocalyptic number.

It is an amenable number.

289866445 is a deficient number, since it is larger than the sum of its proper divisors (91090163).

289866445 is a wasteful number, since it uses less digits than its factorization.

289866445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20780.

The product of its digits is 3317760, while the sum is 52.

The square root of 289866445 is about 17025.4646045269. The cubic root of 289866445 is about 661.8089683157.

The spelling of 289866445 in words is "two hundred eighty-nine million, eight hundred sixty-six thousand, four hundred forty-five".