649456 has 10 divisors (see below), whose sum is σ = 1258352. Its totient is φ = 324720.

The previous prime is 649427. The next prime is 649457. The reversal of 649456 is 654946.

649456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649457) by changing a digit.

649456 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, 20280 + ... + 20311.

2⁶⁴⁹⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

649456 is a deficient number, since it is larger than the sum of its proper divisors (608896).

649456 is a wasteful number, since it uses less digits than its factorization.

649456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40599 (or 40593 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 649456 is about 805.8883297331. Note that the first 3 decimals coincide. The cubic root of 649456 is about 86.5997379394.

The spelling of 649456 in words is "six hundred forty-nine thousand, four hundred fifty-six".