490978 has 8 divisors (see below), whose sum is σ = 760320. Its totient is φ = 237540.

The previous prime is 490969. The next prime is 490991. The reversal of 490978 is 879094.

It is a happy number.

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

It is an unprimeable number.

490978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3898 + ... + 4021.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2⁴⁹⁰⁹⁷⁸ is an apocalyptic number.

490978 is a deficient number, since it is larger than the sum of its proper divisors (269342).

490978 is a wasteful number, since it uses less digits than its factorization.

490978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7952.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 490978 is about 700.6982232031. The cubic root of 490978 is about 78.8897677465.

The spelling of 490978 in words is "four hundred ninety thousand, nine hundred seventy-eight".