540406 has 8 divisors (see below), whose sum is σ = 828000. Its totient is φ = 264408.

The previous prime is 540391. The next prime is 540433. The reversal of 540406 is 604045.

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

It is a congruent number.

It is an unprimeable number.

540406 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, 2781 + ... + 2968.

It is an arithmetic number, because the mean of its divisors is an integer number (103500).

2⁵⁴⁰⁴⁰⁶ is an apocalyptic number.

540406 is a deficient number, since it is larger than the sum of its proper divisors (287594).

540406 is a wasteful number, since it uses less digits than its factorization.

540406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5798.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 540406 is about 735.1231189400. The cubic root of 540406 is about 81.4529317844.

It can be divided in two parts, 540 and 406, that added together give a triangular number (946 = T₄₃).

The spelling of 540406 in words is "five hundred forty thousand, four hundred six".