649704 has 64 divisors (see below), whose sum is σ = 1866240. Its totient is φ = 186560.

The previous prime is 649697. The next prime is 649709. The reversal of 649704 is 407946.

It is not an unprimeable number, because it can be changed into a prime (649709) by changing a digit.

649704 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 15 ways as a sum of consecutive naturals, for example, 6019 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (29160).

2⁶⁴⁹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933120).

649704 is an abundant number, since it is smaller than the sum of its proper divisors (1216536).

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

649704 is a wasteful number, since it uses less digits than its factorization.

649704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 649704 is about 806.0421825190. The cubic root of 649704 is about 86.6107594722.

The spelling of 649704 in words is "six hundred forty-nine thousand, seven hundred four".