491390 has 8 divisors (see below), whose sum is σ = 884520. Its totient is φ = 196552.

The previous prime is 491377. The next prime is 491417. The reversal of 491390 is 93194.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

491390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24560 + ... + 24579.

It is an arithmetic number, because the mean of its divisors is an integer number (110565).

2⁴⁹¹³⁹⁰ is an apocalyptic number.

491390 is a deficient number, since it is larger than the sum of its proper divisors (393130).

491390 is a wasteful number, since it uses less digits than its factorization.

491390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49146.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 491390 is about 700.9921540217. The cubic root of 491390 is about 78.9118281355.

The spelling of 491390 in words is "four hundred ninety-one thousand, three hundred ninety".