649204 has 12 divisors (see below), whose sum is σ = 1147300. Its totient is φ = 321408.

The previous prime is 649183. The next prime is 649217. The reversal of 649204 is 402946.

It can be written as a sum of positive squares in 2 ways, for example, as 291600 + 357604 = 540^2 + 598^2 .

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309 + ... + 1180.

2⁶⁴⁹²⁰⁴ is an apocalyptic number.

It is an amenable number.

649204 is a deficient number, since it is larger than the sum of its proper divisors (498096).

649204 is a wasteful number, since it uses less digits than its factorization.

649204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 649204 is about 805.7319653582. The cubic root of 649204 is about 86.5885357655.

The spelling of 649204 in words is "six hundred forty-nine thousand, two hundred four".