650680128 has 336 divisors, whose sum is σ = 2278115840. Its totient is φ = 180278784.

The previous prime is 650680123. The next prime is 650680141. The reversal of 650680128 is 821086056.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 650680092 and 650680101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650680123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4681083 + ... + 4681221.

Almost surely, 2^650680128 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 650680128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1139057920).

650680128 is an abundant number, since it is smaller than the sum of its proper divisors (1627435712).

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

650680128 is a wasteful number, since it uses less digits than its factorization.

650680128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 650680128 is about 25508.4324881009. The cubic root of 650680128 is about 866.5411300089.

The spelling of 650680128 in words is "six hundred fifty million, six hundred eighty thousand, one hundred twenty-eight".