549478 has 4 divisors (see below), whose sum is σ = 824220. Its totient is φ = 274738.

The previous prime is 549449. The next prime is 549481. The reversal of 549478 is 874945.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874945 = 5 ⋅174989.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

549478 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 as a sum of consecutive naturals, namely, 137368 + ... + 137371.

It is an arithmetic number, because the mean of its divisors is an integer number (206055).

2⁵⁴⁹⁴⁷⁸ is an apocalyptic number.

549478 is a deficient number, since it is larger than the sum of its proper divisors (274742).

549478 is a wasteful number, since it uses less digits than its factorization.

549478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274741.

The product of its digits is 40320, while the sum is 37.

The square root of 549478 is about 741.2678328378. The cubic root of 549478 is about 81.9061985098.

The spelling of 549478 in words is "five hundred forty-nine thousand, four hundred seventy-eight".