649630 has 16 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 257632.

The previous prime is 649619. The next prime is 649631. The reversal of 649630 is 36946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649631) by changing a digit.

649630 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 in 7 ways as a sum of consecutive naturals, for example, 1476 + ... + 1864.

It is an arithmetic number, because the mean of its divisors is an integer number (73710).

2⁶⁴⁹⁶³⁰ is an apocalyptic number.

649630 is a deficient number, since it is larger than the sum of its proper divisors (529730).

649630 is a wasteful number, since it uses less digits than its factorization.

649630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 649630 is about 805.9962779070. The cubic root of 649630 is about 86.6074710827.

The spelling of 649630 in words is "six hundred forty-nine thousand, six hundred thirty".