649030 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 253120.

The previous prime is 649007. The next prime is 649039. The reversal of 649030 is 30946.

It is a junction number, because it is equal to n+sod(n) for n = 648992 and 649010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649039) by changing a digit.

649030 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 382 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁶⁴⁹⁰³⁰ is an apocalyptic number.

649030 is a deficient number, since it is larger than the sum of its proper divisors (548474).

649030 is a wasteful number, since it uses less digits than its factorization.

649030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 649030 is about 805.6239817682. The cubic root of 649030 is about 86.5807992392.

Adding to 649030 its reverse (30946), we get a palindrome (679976).

The spelling of 649030 in words is "six hundred forty-nine thousand, thirty".