501678 has 24 divisors (see below), whose sum is σ = 1111968. Its totient is φ = 163392.

The previous prime is 501659. The next prime is 501691. The reversal of 501678 is 876105.

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

It is a congruent number.

It is an unprimeable number.

501678 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550 + ... + 1142.

It is an arithmetic number, because the mean of its divisors is an integer number (46332).

2⁵⁰¹⁶⁷⁸ is an apocalyptic number.

501678 is an abundant number, since it is smaller than the sum of its proper divisors (610290).

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

501678 is a wasteful number, since it uses less digits than its factorization.

501678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 501678 is about 708.2923125377. The cubic root of 501678 is about 79.4587420905.

It can be divided in two parts, 50 and 1678, that added together give a cube (1728 = 12³).

The spelling of 501678 in words is "five hundred one thousand, six hundred seventy-eight".