548978 has 4 divisors (see below), whose sum is σ = 823470. Its totient is φ = 274488.

The previous prime is 548963. The next prime is 549001. The reversal of 548978 is 879845.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 528529 + 20449 = 727^2 + 143^2 .

It is an unprimeable number.

548978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137243 + ... + 137246.

2⁵⁴⁸⁹⁷⁸ is an apocalyptic number.

548978 is a deficient number, since it is larger than the sum of its proper divisors (274492).

548978 is a wasteful number, since it uses less digits than its factorization.

548978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274491.

The product of its digits is 80640, while the sum is 41.

The square root of 548978 is about 740.9304960656. The cubic root of 548978 is about 81.8813473315.

The spelling of 548978 in words is "five hundred forty-eight thousand, nine hundred seventy-eight".