8540489 has 4 divisors (see below), whose sum is σ = 8657556. Its totient is φ = 8423424.

The previous prime is 8540479. The next prime is 8540501. The reversal of 8540489 is 9840458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5442889 + 3097600 = 2333^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8540489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8540479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58424 + ... + 58569.

It is an arithmetic number, because the mean of its divisors is an integer number (2164389).

Almost surely, 2^8540489 is an apocalyptic number.

It is an amenable number.

8540489 is a deficient number, since it is larger than the sum of its proper divisors (117067).

8540489 is a wasteful number, since it uses less digits than its factorization.

8540489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117066.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 8540489 is about 2922.4115042204. The cubic root of 8540489 is about 204.4062853346.

The spelling of 8540489 in words is "eight million, five hundred forty thousand, four hundred eighty-nine".