649696 has 24 divisors (see below), whose sum is σ = 1300320. Its totient is φ = 319488.

The previous prime is 649661. The next prime is 649697. The reversal of 649696 is 696946.

649696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

649696 is a modest number, since divided by 9696 gives 64 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649697) by changing a digit.

649696 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 3 ways as a sum of consecutive naturals, for example, 2400 + ... + 2656.

It is an arithmetic number, because the mean of its divisors is an integer number (54180).

2⁶⁴⁹⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

649696 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649696 is a wasteful number, since it uses less digits than its factorization.

649696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 338 counting only the distinct ones).

The product of its digits is 69984, while the sum is 40.

The square root of 649696 is about 806.0372199843. The cubic root of 649696 is about 86.6104039827.

The spelling of 649696 in words is "six hundred forty-nine thousand, six hundred ninety-six".