649530 has 48 divisors (see below), whose sum is σ = 1931904. Its totient is φ = 148320.

The previous prime is 649529. The next prime is 649541. The reversal of 649530 is 35946.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 649494 and 649503.

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 23 ways as a sum of consecutive naturals, for example, 115 + ... + 1145.

It is an arithmetic number, because the mean of its divisors is an integer number (40248).

2⁶⁴⁹⁵³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965952).

649530 is an abundant number, since it is smaller than the sum of its proper divisors (1282374).

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

649530 is a wasteful number, since it uses less digits than its factorization.

649530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 649530 is about 805.9342404936. The cubic root of 649530 is about 86.6030269162.

The spelling of 649530 in words is "six hundred forty-nine thousand, five hundred thirty".