651628 has 6 divisors (see below), whose sum is σ = 1140356. Its totient is φ = 325812.

The previous prime is 651617. The next prime is 651641. The reversal of 651628 is 826156.

651628 is nontrivially palindromic in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 651596 and 651605.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 81450 + ... + 81457.

2⁶⁵¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

651628 is a deficient number, since it is larger than the sum of its proper divisors (488728).

651628 is a wasteful number, since it uses less digits than its factorization.

651628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162911 (or 162909 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 651628 is about 807.2347861682. The cubic root of 651628 is about 86.6961700998.

The spelling of 651628 in words is "six hundred fifty-one thousand, six hundred twenty-eight".