630816 has 24 divisors (see below), whose sum is σ = 1656144. Its totient is φ = 210240.

The previous prime is 630803. The next prime is 630823. The reversal of 630816 is 618036.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

630816 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 (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3190 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (69006).

2⁶³⁰⁸¹⁶ is an apocalyptic number.

It is an amenable number.

630816 is an abundant number, since it is smaller than the sum of its proper divisors (1025328).

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

630816 is a wasteful number, since it uses less digits than its factorization.

630816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584 (or 6576 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 630816 is about 794.2392586620. The cubic root of 630816 is about 85.7631847967.

The spelling of 630816 in words is "six hundred thirty thousand, eight hundred sixteen".