540638 has 24 divisors (see below), whose sum is σ = 982128. Its totient is φ = 218592.

The previous prime is 540629. The next prime is 540677. The reversal of 540638 is 836045.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 540638.

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 7370 + ... + 7442.

It is an arithmetic number, because the mean of its divisors is an integer number (40922).

2⁵⁴⁰⁶³⁸ is an apocalyptic number.

540638 is a deficient number, since it is larger than the sum of its proper divisors (441490).

540638 is a wasteful number, since it uses less digits than its factorization.

540638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 540638 is about 735.2808987047. The cubic root of 540638 is about 81.4645862174.

The spelling of 540638 in words is "five hundred forty thousand, six hundred thirty-eight".