649950 has 48 divisors (see below), whose sum is σ = 1845120. Its totient is φ = 148320.

The previous prime is 649937. The next prime is 649969. The reversal of 649950 is 59946.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649950.

It is an unprimeable number.

649950 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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 741 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (38440).

2⁶⁴⁹⁹⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922560).

649950 is an abundant number, since it is smaller than the sum of its proper divisors (1195170).

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

649950 is a wasteful number, since it uses less digits than its factorization.

649950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 649950 is about 806.1947655499. The cubic root of 649950 is about 86.6216893512.

The spelling of 649950 in words is "six hundred forty-nine thousand, nine hundred fifty".