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494 = 21319

494 has 8 divisors (see below), whose sum is σ = 840. Its totient is φ = 216.

The previous prime is 491. The next prime is 499.

494 is nontrivially palindromic in base 10.

494 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

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

It is an alternating number because its digits alternate between even and odd.

494 is an undulating number in base 5 and base 10.

It is a plaindrome in base 15 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 494.

It is not an unprimeable number, because it can be changed into a prime (491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 35.

It is an arithmetic number, because the mean of its divisors is an integer number (105).

494 is a deficient number, since it is larger than the sum of its proper divisors (346).

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

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

The sum of its prime factors is 34.

The product of its digits is 144, while the sum is 17.

The square root of 494 is about 22.2261107709. The cubic root of 494 is about 7.9051293933.

It can be divided in two parts, 49 and 4, that multiplied together give a square (196 = 142).

The spelling of 494 in words is "four hundred ninety-four", and thus it is an aban number.

Divisors: 1 2 13 19 26 38 247 494