651648 has 32 divisors (see below), whose sum is σ = 1731960. Its totient is φ = 217088.

The previous prime is 651647. The next prime is 651649. The reversal of 651648 is 846156.

It is an interprime number because it is at equal distance from previous prime (651647) and next prime (651649).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465 + ... + 1232.

2⁶⁵¹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

651648 is an abundant number, since it is smaller than the sum of its proper divisors (1080312).

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

651648 is a wasteful number, since it uses less digits than its factorization.

651648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714 (or 1702 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 651648 is about 807.2471740427. The cubic root of 651648 is about 86.6970570607.

The spelling of 651648 in words is "six hundred fifty-one thousand, six hundred forty-eight".