540402 has 8 divisors (see below), whose sum is σ = 1080816. Its totient is φ = 180132.

The previous prime is 540391. The next prime is 540433. The reversal of 540402 is 204045.

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

540402 is an admirable number.

It is an unprimeable number.

540402 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45028 + ... + 45039.

It is an arithmetic number, because the mean of its divisors is an integer number (135102).

2⁵⁴⁰⁴⁰² is an apocalyptic number.

540402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

540402 is a wasteful number, since it uses less digits than its factorization.

540402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90072.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 540402 is about 735.1203983022. The cubic root of 540402 is about 81.4527308167.

Adding to 540402 its reverse (204045), we get a palindrome (744447).

The spelling of 540402 in words is "five hundred forty thousand, four hundred two".