630992 has 20 divisors (see below), whose sum is σ = 1236900. Its totient is φ = 311808.

The previous prime is 630967. The next prime is 630997. The reversal of 630992 is 299036.

It can be written as a sum of positive squares in 2 ways, for example, as 190096 + 440896 = 436^2 + 664^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 630992.

It is not an unprimeable number, because it can be changed into a prime (630997) by changing a digit.

630992 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 in 3 ways as a sum of consecutive naturals, for example, 1634 + ... + 1982.

It is an arithmetic number, because the mean of its divisors is an integer number (61845).

2⁶³⁰⁹⁹² is an apocalyptic number.

It is an amenable number.

630992 is a deficient number, since it is larger than the sum of its proper divisors (605908).

630992 is a wasteful number, since it uses less digits than its factorization.

630992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 630992 is about 794.3500487820. The cubic root of 630992 is about 85.7711601371.

The spelling of 630992 in words is "six hundred thirty thousand, nine hundred ninety-two".