649340 has 12 divisors (see below), whose sum is σ = 1363656. Its totient is φ = 259728.

The previous prime is 649321. The next prime is 649361. The reversal of 649340 is 43946.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 16214 + ... + 16253.

It is an arithmetic number, because the mean of its divisors is an integer number (113638).

2⁶⁴⁹³⁴⁰ is an apocalyptic number.

It is an amenable number.

649340 is an abundant number, since it is smaller than the sum of its proper divisors (714316).

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

649340 is a wasteful number, since it uses less digits than its factorization.

649340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32476 (or 32474 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 649340 is about 805.8163562500. The cubic root of 649340 is about 86.5945817432.

It can be divided in two parts, 649 and 340, that added together give a palindrome (989).

The spelling of 649340 in words is "six hundred forty-nine thousand, three hundred forty".