649444 has 12 divisors (see below), whose sum is σ = 1143100. Its totient is φ = 322848.

The previous prime is 649427. The next prime is 649457. The reversal of 649444 is 444946.

649444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 289444 = 600^2 + 538^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 15.

It is an unprimeable number.

649444 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, 562 + ... + 1270.

2⁶⁴⁹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

649444 is a deficient number, since it is larger than the sum of its proper divisors (493656).

649444 is a wasteful number, since it uses less digits than its factorization.

649444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 940 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 649444 is about 805.8808844984. The cubic root of 649444 is about 86.5992045683.

The spelling of 649444 in words is "six hundred forty-nine thousand, four hundred forty-four".