651328 has 14 divisors (see below), whose sum is σ = 1292606. Its totient is φ = 325632.

The previous prime is 651323. The next prime is 651331. The reversal of 651328 is 823156.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 589824 + 61504 = 768^2 + 248^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (651323) by changing a digit.

651328 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (92329).

2⁶⁵¹³²⁸ is an apocalyptic number.

It is an amenable number.

651328 is a deficient number, since it is larger than the sum of its proper divisors (641278).

651328 is a wasteful number, since it uses less digits than its factorization.

651328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10189 (or 10179 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 651328 is about 807.0489452319. The cubic root of 651328 is about 86.6828635080.

It can be divided in two parts, 651 and 328, that added together give a palindrome (979).

The spelling of 651328 in words is "six hundred fifty-one thousand, three hundred twenty-eight".