540646 has 4 divisors (see below), whose sum is σ = 810972. Its totient is φ = 270322.

The previous prime is 540629. The next prime is 540677. The reversal of 540646 is 646045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646045 = 5 ⋅129209.

It is a self number, because there is not a number n which added to its sum of digits gives 540646.

It is a congruent number.

It is an unprimeable number.

540646 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 as a sum of consecutive naturals, namely, 135160 + ... + 135163.

It is an arithmetic number, because the mean of its divisors is an integer number (202743).

2⁵⁴⁰⁶⁴⁶ is an apocalyptic number.

540646 is a deficient number, since it is larger than the sum of its proper divisors (270326).

540646 is a wasteful number, since it uses less digits than its factorization.

540646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270325.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 540646 is about 735.2863387824. The cubic root of 540646 is about 81.4649880350.

The spelling of 540646 in words is "five hundred forty thousand, six hundred forty-six".