649750 has 32 divisors (see below), whose sum is σ = 1280448. Its totient is φ = 246400.

The previous prime is 649739. The next prime is 649751. The reversal of 649750 is 57946.

649750 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 (649751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5694 + ... + 5806.

It is an arithmetic number, because the mean of its divisors is an integer number (40014).

2⁶⁴⁹⁷⁵⁰ is an apocalyptic number.

649750 is a deficient number, since it is larger than the sum of its proper divisors (630698).

649750 is a wasteful number, since it uses less digits than its factorization.

649750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 649750 is about 806.0707165007. The cubic root of 649750 is about 86.6128034804.

The spelling of 649750 in words is "six hundred forty-nine thousand, seven hundred fifty".