650785720 has 128 divisors (see below), whose sum is σ = 1673280000. Its totient is φ = 225815040.

The previous prime is 650785703. The next prime is 650785741. The reversal of 650785720 is 27587056.

650785720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1965955 + ... + 1966285.

It is an arithmetic number, because the mean of its divisors is an integer number (13072500).

Almost surely, 2^650785720 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 650785720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836640000).

650785720 is an abundant number, since it is smaller than the sum of its proper divisors (1022494280).

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

650785720 is a wasteful number, since it uses less digits than its factorization.

650785720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 650785720 is about 25510.5021510750. The cubic root of 650785720 is about 866.5880014070.

The spelling of 650785720 in words is "six hundred fifty million, seven hundred eighty-five thousand, seven hundred twenty".