8427289 has 8 divisors (see below), whose sum is σ = 9135560. Its totient is φ = 7727616.

The previous prime is 8427283. The next prime is 8427299. The reversal of 8427289 is 9827248.

8427289 = T₂₄₆ + T₂₄₇ + ... + T₄₀₂.

It can be written as a sum of positive squares in 4 ways, for example, as 115600 + 8311689 = 340^2 + 2883^2 .

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

It is not a de Polignac number, because 8427289 - 2⁷ = 8427161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8427283) 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, 24 + ... + 4105.

It is an arithmetic number, because the mean of its divisors is an integer number (1141945).

Almost surely, 2^8427289 is an apocalyptic number.

It is an amenable number.

8427289 is a deficient number, since it is larger than the sum of its proper divisors (708271).

8427289 is a wasteful number, since it uses less digits than its factorization.

8427289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299.

The product of its digits is 64512, while the sum is 40.

The square root of 8427289 is about 2902.9793316522. The cubic root of 8427289 is about 203.4991638913.

The spelling of 8427289 in words is "eight million, four hundred twenty-seven thousand, two hundred eighty-nine".