543780 has 96 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 134784.

The previous prime is 543773. The next prime is 543787. The reversal of 543780 is 87345.

It is an interprime number because it is at equal distance from previous prime (543773) and next prime (543787).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543787) by changing a digit.

543780 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 31 ways as a sum of consecutive naturals, for example, 10234 + ... + 10286.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2⁵⁴³⁷⁸⁰ 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 543780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

543780 is an abundant number, since it is smaller than the sum of its proper divisors (1270620).

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

543780 is a wasteful number, since it uses less digits than its factorization.

543780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 543780 is about 737.4144018122. The cubic root of 543780 is about 81.6220960923.

The spelling of 543780 in words is "five hundred forty-three thousand, seven hundred eighty".