650720 has 72 divisors (see below), whose sum is σ = 1809864. Its totient is φ = 220416.

The previous prime is 650701. The next prime is 650759. The reversal of 650720 is 27056.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 650692 and 650701.

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 650720.

It is an unprimeable number.

650720 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 11 ways as a sum of consecutive naturals, for example, 7799 + ... + 7881.

It is an arithmetic number, because the mean of its divisors is an integer number (25137).

2⁶⁵⁰⁷²⁰ 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 650720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904932).

650720 is an abundant number, since it is smaller than the sum of its proper divisors (1159144).

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

650720 is a wasteful number, since it uses less digits than its factorization.

650720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 650720 is about 806.6721762897. The cubic root of 650720 is about 86.6558829449.

Adding to 650720 its reverse (27056), we get a palindrome (677776).

The spelling of 650720 in words is "six hundred fifty thousand, seven hundred twenty".