505978 has 16 divisors (see below), whose sum is σ = 839520. Its totient is φ = 226800.

The previous prime is 505969. The next prime is 505979. The reversal of 505978 is 879505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2293 + ... + 2503.

It is an arithmetic number, because the mean of its divisors is an integer number (52470).

2⁵⁰⁵⁹⁷⁸ is an apocalyptic number.

505978 is a deficient number, since it is larger than the sum of its proper divisors (333542).

505978 is a wasteful number, since it uses less digits than its factorization.

505978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 505978 is about 711.3213057402. The cubic root of 505978 is about 79.6851163967.

It can be divided in two parts, 50597 and 8, that added together give a palindrome (50605).

The spelling of 505978 in words is "five hundred five thousand, nine hundred seventy-eight".