649576 has 8 divisors (see below), whose sum is σ = 1217970. Its totient is φ = 324784.

The previous prime is 649573. The next prime is 649577. The reversal of 649576 is 675946.

649576 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 527076 + 122500 = 726^2 + 350^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (649573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40591 + ... + 40606.

2⁶⁴⁹⁵⁷⁶ is an apocalyptic number.

It is an amenable number.

649576 is a deficient number, since it is larger than the sum of its proper divisors (568394).

649576 is a wasteful number, since it uses less digits than its factorization.

649576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81203 (or 81199 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 649576 is about 805.9627782969. The cubic root of 649576 is about 86.6050712894.

It can be divided in two parts, 649 and 576, that added together give a triangular number (1225 = T₄₉).

The spelling of 649576 in words is "six hundred forty-nine thousand, five hundred seventy-six".