649318 has 8 divisors (see below), whose sum is σ = 984312. Its totient is φ = 321216.

The previous prime is 649307. The next prime is 649321. The reversal of 649318 is 813946.

649318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×649318² = 843227730248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480 + ... + 1867.

It is an arithmetic number, because the mean of its divisors is an integer number (123039).

2⁶⁴⁹³¹⁸ is an apocalyptic number.

649318 is a deficient number, since it is larger than the sum of its proper divisors (334994).

649318 is a wasteful number, since it uses less digits than its factorization.

649318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446.

The product of its digits is 5184, while the sum is 31.

The square root of 649318 is about 805.8027053814. The cubic root of 649318 is about 86.5936037746.

The spelling of 649318 in words is "six hundred forty-nine thousand, three hundred eighteen".