540438 has 8 divisors (see below), whose sum is σ = 1080888. Its totient is φ = 180144.

The previous prime is 540437. The next prime is 540461. The reversal of 540438 is 834045.

It is a happy number.

540438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

540438 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 540438.

It is not an unprimeable number, because it can be changed into a prime (540433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45031 + ... + 45042.

It is an arithmetic number, because the mean of its divisors is an integer number (135111).

2⁵⁴⁰⁴³⁸ is an apocalyptic number.

540438 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.

540438 is a wasteful number, since it uses less digits than its factorization.

540438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90078.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 540438 is about 735.1448836794. The cubic root of 540438 is about 81.4545394907.

The spelling of 540438 in words is "five hundred forty thousand, four hundred thirty-eight".