540399 has 8 divisors (see below), whose sum is σ = 732592. Its totient is φ = 354240.

The previous prime is 540391. The next prime is 540433. The reversal of 540399 is 993045.

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

It is not a de Polignac number, because 540399 - 2³ = 540391 is a prime.

It is a Duffinian number.

540399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540391) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1294 + ... + 1659.

It is an arithmetic number, because the mean of its divisors is an integer number (91574).

2⁵⁴⁰³⁹⁹ is an apocalyptic number.

540399 is a deficient number, since it is larger than the sum of its proper divisors (192193).

540399 is a wasteful number, since it uses less digits than its factorization.

540399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 540399 is about 735.1183578173. The cubic root of 540399 is about 81.4525800902.

It can be divided in two parts, 540 and 399, that added together give a palindrome (939).

The spelling of 540399 in words is "five hundred forty thousand, three hundred ninety-nine".