549780 has 144 divisors (see below), whose sum is σ = 2068416. Its totient is φ = 107520.

The previous prime is 549767. The next prime is 549817. The reversal of 549780 is 87945.

549780 = T₁₁₃ + T₁₁₄ + ... + T₁₆₇.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a zygodrome in base 7.

It is a congruent number.

It is an unprimeable number.

549780 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 47 ways as a sum of consecutive naturals, for example, 32332 + ... + 32348.

It is an arithmetic number, because the mean of its divisors is an integer number (14364).

2⁵⁴⁹⁷⁸⁰ 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 549780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034208).

549780 is an abundant number, since it is smaller than the sum of its proper divisors (1518636).

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

549780 is a wasteful number, since it uses less digits than its factorization.

549780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 549780 is about 741.4715099045. The cubic root of 549780 is about 81.9212013196.

The spelling of 549780 in words is "five hundred forty-nine thousand, seven hundred eighty".