870489 has 9 divisors (see below), whose sum is σ = 1261429. Its totient is φ = 578460.

The previous prime is 870479. The next prime is 870491. The reversal of 870489 is 984078.

The square root of 870489 is 933.

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

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

It is not a de Polignac number, because 870489 - 2¹³ = 862297 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870489.

It is not an unprimeable number, because it can be changed into a prime (870479) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2644 + ... + 2954.

2⁸⁷⁰⁴⁸⁹ is an apocalyptic number.

870489 is the 933-rd square number.

870489 is the 467-th centered octagonal number.

It is an amenable number.

870489 is a deficient number, since it is larger than the sum of its proper divisors (390940).

870489 is an equidigital number, since it uses as much as digits as its factorization.

870489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The cubic root of 870489 is about 95.4819095326.

Multiplying 870489 by its sum of digits (36), we get a square (31337604 = 5598²).

The spelling of 870489 in words is "eight hundred seventy thousand, four hundred eighty-nine".