649016 has 16 divisors (see below), whose sum is σ = 1256640. Its totient is φ = 313920.

The previous prime is 649007. The next prime is 649039. The reversal of 649016 is 610946.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

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, 1061 + ... + 1556.

It is an arithmetic number, because the mean of its divisors is an integer number (78540).

2⁶⁴⁹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

649016 is a deficient number, since it is larger than the sum of its proper divisors (607624).

649016 is a wasteful number, since it uses less digits than its factorization.

649016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654 (or 2650 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 649016 is about 805.6152928042. The cubic root of 649016 is about 86.5801767000.

The spelling of 649016 in words is "six hundred forty-nine thousand, sixteen".