490878509 has 8 divisors (see below), whose sum is σ = 563688480. Its totient is φ = 422766000.

The previous prime is 490878467. The next prime is 490878511. The reversal of 490878509 is 905878094.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490878509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490878539) 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, 1174142 + ... + 1174559.

It is an arithmetic number, because the mean of its divisors is an integer number (70461060).

Almost surely, 2^490878509 is an apocalyptic number.

It is an amenable number.

490878509 is a deficient number, since it is larger than the sum of its proper divisors (72809971).

490878509 is a wasteful number, since it uses less digits than its factorization.

490878509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348731.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 490878509 is about 22155.7782305204. The cubic root of 490878509 is about 788.8443868752.

The spelling of 490878509 in words is "four hundred ninety million, eight hundred seventy-eight thousand, five hundred nine".