540668 has 12 divisors (see below), whose sum is σ = 1001952. Its totient is φ = 254400.

The previous prime is 540629. The next prime is 540677. The reversal of 540668 is 866045.

It is a self number, because there is not a number n which added to its sum of digits gives 540668.

It is a congruent number.

It is an unprimeable number.

540668 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 3 ways as a sum of consecutive naturals, for example, 3908 + ... + 4043.

It is an arithmetic number, because the mean of its divisors is an integer number (83496).

2⁵⁴⁰⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

540668 is a deficient number, since it is larger than the sum of its proper divisors (461284).

540668 is a wasteful number, since it uses less digits than its factorization.

540668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7972 (or 7970 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 540668 is about 735.3012987885. The cubic root of 540668 is about 81.4660930127.

The spelling of 540668 in words is "five hundred forty thousand, six hundred sixty-eight".