497778 has 8 divisors (see below), whose sum is σ = 995568. Its totient is φ = 165924.

The previous prime is 497773. The next prime is 497801. The reversal of 497778 is 877794.

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

497778 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 497778.

It is not an unprimeable number, because it can be changed into a prime (497771) by changing a digit.

497778 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, 41476 + ... + 41487.

It is an arithmetic number, because the mean of its divisors is an integer number (124446).

2⁴⁹⁷⁷⁷⁸ is an apocalyptic number.

497778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

497778 is a wasteful number, since it uses less digits than its factorization.

497778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82968.

The product of its digits is 98784, while the sum is 42.

The square root of 497778 is about 705.5338404357. The cubic root of 497778 is about 79.2523044970.

It can be divided in two parts, 497 and 778, that added together give a triangular number (1275 = T₅₀).

The spelling of 497778 in words is "four hundred ninety-seven thousand, seven hundred seventy-eight".