540432 has 60 divisors (see below), whose sum is σ = 1579760. Its totient is φ = 178848.

The previous prime is 540391. The next prime is 540433. The reversal of 540432 is 234045.

It is a happy number.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

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 11 ways as a sum of consecutive naturals, for example, 3819 + ... + 3957.

2⁵⁴⁰⁴³² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 540432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789880).

540432 is an abundant number, since it is smaller than the sum of its proper divisors (1039328).

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

540432 is a wasteful number, since it uses less digits than its factorization.

540432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 540432 is about 735.1408028398. The cubic root of 540432 is about 81.4542380506.

Adding to 540432 its reverse (234045), we get a palindrome (774477).

It can be divided in two parts, 54043 and 2, that added together give a palindrome (54045).

The spelling of 540432 in words is "five hundred forty thousand, four hundred thirty-two".