491603578 has 8 divisors (see below), whose sum is σ = 741821472. Its totient is φ = 244329756.

The previous prime is 491603573. The next prime is 491603579. The reversal of 491603578 is 875306194.

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

It is not an unprimeable number, because it can be changed into a prime (491603573) 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, 735600 + ... + 736267.

It is an arithmetic number, because the mean of its divisors is an integer number (92727684).

Almost surely, 2^491603578 is an apocalyptic number.

491603578 is a deficient number, since it is larger than the sum of its proper divisors (250217894).

491603578 is a wasteful number, since it uses less digits than its factorization.

491603578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472036.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 491603578 is about 22172.1351700733. The cubic root of 491603578 is about 789.2325923862.

The spelling of 491603578 in words is "four hundred ninety-one million, six hundred three thousand, five hundred seventy-eight".