650021328 has 160 divisors (see below), whose sum is σ = 2090997120. Its totient is φ = 191600640.

The previous prime is 650021321. The next prime is 650021353. The reversal of 650021328 is 823120056.

650021328 is a `hidden beast` number, since 650 + 0 + 2 + 1 + 3 + 2 + 8 = 666.

650021328 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 (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650021321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173976 + ... + 177672.

It is an arithmetic number, because the mean of its divisors is an integer number (13068732).

Almost surely, 2^650021328 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 650021328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045498560).

650021328 is an abundant number, since it is smaller than the sum of its proper divisors (1440975792).

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

650021328 is a wasteful number, since it uses less digits than its factorization.

650021328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762 (or 3750 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 650021328 is about 25495.5158410258. The cubic root of 650021328 is about 866.2485796720.

The spelling of 650021328 in words is "six hundred fifty million, twenty-one thousand, three hundred twenty-eight".