491398 has 8 divisors (see below), whose sum is σ = 740592. Its totient is φ = 244536.

The previous prime is 491377. The next prime is 491417. The reversal of 491398 is 893194.

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

It is a congruent number.

It is an unprimeable 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, 111 + ... + 997.

It is an arithmetic number, because the mean of its divisors is an integer number (92574).

2⁴⁹¹³⁹⁸ is an apocalyptic number.

491398 is a deficient number, since it is larger than the sum of its proper divisors (249194).

491398 is a wasteful number, since it uses less digits than its factorization.

491398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166.

The product of its digits is 7776, while the sum is 34.

The square root of 491398 is about 700.9978601964. The cubic root of 491398 is about 78.9122563705.

The spelling of 491398 in words is "four hundred ninety-one thousand, three hundred ninety-eight".