650856 has 32 divisors (see below), whose sum is σ = 1664640. Its totient is φ = 211968.

The previous prime is 650851. The next prime is 650861. The reversal of 650856 is 658056.

It is an interprime number because it is at equal distance from previous prime (650851) and next prime (650861).

It is a super-2 number, since 2×650856² = 847227065472, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650851) by changing a digit.

650856 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 7 ways as a sum of consecutive naturals, for example, 840 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (52020).

2⁶⁵⁰⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 650856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832320).

650856 is an abundant number, since it is smaller than the sum of its proper divisors (1013784).

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

650856 is a wasteful number, since it uses less digits than its factorization.

650856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 650856 is about 806.7564688306. The cubic root of 650856 is about 86.6619195296.

The spelling of 650856 in words is "six hundred fifty thousand, eight hundred fifty-six".