649446 has 36 divisors (see below), whose sum is σ = 1543788. Its totient is φ = 181608.

The previous prime is 649427. The next prime is 649457. The reversal of 649446 is 644946.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is an unprimeable number.

649446 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 17 ways as a sum of consecutive naturals, for example, 13795 + ... + 13841.

It is an arithmetic number, because the mean of its divisors is an integer number (42883).

2⁶⁴⁹⁴⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771894).

649446 is an abundant number, since it is smaller than the sum of its proper divisors (894342).

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

649446 is a wasteful number, since it uses less digits than its factorization.

649446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 59 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 649446 is about 805.8821253757. The cubic root of 649446 is about 86.5992934639.

The spelling of 649446 in words is "six hundred forty-nine thousand, four hundred forty-six".