649312 has 24 divisors (see below), whose sum is σ = 1297296. Its totient is φ = 319872.

The previous prime is 649307. The next prime is 649321. The reversal of 649312 is 213946.

It is a congruent number.

It is an unprimeable number.

649312 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3198 + ... + 3394.

It is an arithmetic number, because the mean of its divisors is an integer number (54054).

2⁶⁴⁹³¹² is an apocalyptic number.

It is an amenable number.

649312 is a deficient number, since it is larger than the sum of its proper divisors (647984).

649312 is a wasteful number, since it uses less digits than its factorization.

649312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 302 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 649312 is about 805.7989823771. The cubic root of 649312 is about 86.5933370521.

It can be divided in two parts, 649 and 312, that added together give a square (961 = 31²).

The spelling of 649312 in words is "six hundred forty-nine thousand, three hundred twelve".