543402 has 32 divisors (see below), whose sum is σ = 1252800. Its totient is φ = 174384.

The previous prime is 543383. The next prime is 543407. The reversal of 543402 is 204345.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (543407) by changing a digit.

543402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393 + ... + 1739.

It is an arithmetic number, because the mean of its divisors is an integer number (39150).

2⁵⁴³⁴⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 543402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626400).

543402 is an abundant number, since it is smaller than the sum of its proper divisors (709398).

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

543402 is a wasteful number, since it uses less digits than its factorization.

543402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 381 counting only the distinct ones).

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

The square root of 543402 is about 737.1580563217. The cubic root of 543402 is about 81.6031789419.

Adding to 543402 its reverse (204345), we get a palindrome (747747).

The spelling of 543402 in words is "five hundred forty-three thousand, four hundred two".