638548 has 12 divisors (see below), whose sum is σ = 1136212. Its totient is φ = 313920.

The previous prime is 638527. The next prime is 638567. The reversal of 638548 is 845836.

It can be written as a sum of positive squares in 2 ways, for example, as 327184 + 311364 = 572^2 + 558^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1065 + ... + 1552.

2⁶³⁸⁵⁴⁸ is an apocalyptic number.

It is an amenable number.

638548 is a deficient number, since it is larger than the sum of its proper divisors (497664).

638548 is a wasteful number, since it uses less digits than its factorization.

638548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682 (or 2680 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 638548 is about 799.0919846926. The cubic root of 638548 is about 86.1121666036.

The spelling of 638548 in words is "six hundred thirty-eight thousand, five hundred forty-eight".