549720 has 64 divisors (see below), whose sum is σ = 1836000. Its totient is φ = 146304.

The previous prime is 549719. The next prime is 549733. The reversal of 549720 is 27945.

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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826 + ... + 1334.

2⁵⁴⁹⁷²⁰ 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 549720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918000).

549720 is an abundant number, since it is smaller than the sum of its proper divisors (1286280).

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

549720 is a wasteful number, since it uses less digits than its factorization.

549720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 549720 is about 741.4310487159. The cubic root of 549720 is about 81.9182210663.

The spelling of 549720 in words is "five hundred forty-nine thousand, seven hundred twenty".