493978 has 8 divisors (see below), whose sum is σ = 753300. Its totient is φ = 242880.

The previous prime is 493973. The next prime is 493979. The reversal of 493978 is 879394.

It can be written as a sum of positive squares in 2 ways, for example, as 405769 + 88209 = 637^2 + 297^2 .

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

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 493978.

It is not an unprimeable number, because it can be changed into a prime (493973) 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, 1903 + ... + 2146.

2⁴⁹³⁹⁷⁸ is an apocalyptic number.

493978 is a deficient number, since it is larger than the sum of its proper divisors (259322).

493978 is a wasteful number, since it uses less digits than its factorization.

493978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112.

The product of its digits is 54432, while the sum is 40.

The square root of 493978 is about 702.8356849222. The cubic root of 493978 is about 79.0501204143.

The spelling of 493978 in words is "four hundred ninety-three thousand, nine hundred seventy-eight".