649304 has 8 divisors (see below), whose sum is σ = 1217460. Its totient is φ = 324648.

The previous prime is 649291. The next prime is 649307. The reversal of 649304 is 403946.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649307) by changing a digit.

649304 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, 40574 + ... + 40589.

2⁶⁴⁹³⁰⁴ is an apocalyptic number.

It is an amenable number.

649304 is a deficient number, since it is larger than the sum of its proper divisors (568156).

649304 is a wasteful number, since it uses less digits than its factorization.

649304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81169 (or 81165 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 649304 is about 805.7940183446. The cubic root of 649304 is about 86.5929814195.

The spelling of 649304 in words is "six hundred forty-nine thousand, three hundred four".