649604 has 24 divisors (see below), whose sum is σ = 1238328. Its totient is φ = 296960.

The previous prime is 649577. The next prime is 649613. The reversal of 649604 is 406946.

It can be written as a sum of positive squares in 4 ways, for example, as 6400 + 643204 = 80^2 + 802^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2672 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (51597).

2⁶⁴⁹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

649604 is a deficient number, since it is larger than the sum of its proper divisors (588724).

649604 is a wasteful number, since it uses less digits than its factorization.

649604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 649604 is about 805.9801486389. The cubic root of 649604 is about 86.6063156433.

It can be divided in two parts, 64 and 9604, that multiplied together give a 4-th power (614656 = 28⁴).

The spelling of 649604 in words is "six hundred forty-nine thousand, six hundred four".