649360 has 20 divisors (see below), whose sum is σ = 1509948. Its totient is φ = 259712.

The previous prime is 649321. The next prime is 649361. The reversal of 649360 is 63946.

It can be written as a sum of positive squares in 2 ways, for example, as 430336 + 219024 = 656^2 + 468^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (649361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3979 + ... + 4138.

2⁶⁴⁹³⁶⁰ is an apocalyptic number.

It is an amenable number.

649360 is an abundant number, since it is smaller than the sum of its proper divisors (860588).

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

649360 is a wasteful number, since it uses less digits than its factorization.

649360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130 (or 8124 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 649360 is about 805.8287659298. The cubic root of 649360 is about 86.5954707863.

The spelling of 649360 in words is "six hundred forty-nine thousand, three hundred sixty".