547820 has 72 divisors (see below), whose sum is σ = 1474704. Its totient is φ = 169344.

The previous prime is 547819. The next prime is 547823. The reversal of 547820 is 28745.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 547820.

It is not an unprimeable number, because it can be changed into a prime (547823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12719 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (20482).

2⁵⁴⁷⁸²⁰ 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 547820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737352).

547820 is an abundant number, since it is smaller than the sum of its proper divisors (926884).

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

547820 is a wasteful number, since it uses less digits than its factorization.

547820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 547820 is about 740.1486337216. The cubic root of 547820 is about 81.8237340041.

The spelling of 547820 in words is "five hundred forty-seven thousand, eight hundred twenty".