844890489 has 9 divisors (see below), whose sum is σ = 1220523343. Its totient is φ = 563202192.

The previous prime is 844890479. The next prime is 844890547. The reversal of 844890489 is 984098448.

The square root of 844890489 is 29067.

It is a perfect power (a square), and thus also a powerful number.

844890489 is a `hidden beast` number, since 84 + 4 + 89 + 0 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 471628089 + 373262400 = 21717^2 + 19320^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 844890489 - 2¹¹ = 844888441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844890469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 82357 + ... + 92045.

Almost surely, 2^844890489 is an apocalyptic number.

844890489 is the 29067-th square number.

844890489 is the 14534-th centered octagonal number.

It is an amenable number.

844890489 is a deficient number, since it is larger than the sum of its proper divisors (375632854).

844890489 is an frugal number, since it uses more digits than its factorization.

844890489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19384 (or 9692 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The cubic root of 844890489 is about 945.3663516160.

The spelling of 844890489 in words is "eight hundred forty-four million, eight hundred ninety thousand, four hundred eighty-nine".