630845 has 8 divisors (see below), whose sum is σ = 761400. Its totient is φ = 501760.

The previous prime is 630841. The next prime is 630863. The reversal of 630845 is 548036.

It can be written as a sum of positive squares in 4 ways, for example, as 128164 + 502681 = 358^2 + 709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 630845 - 2² = 630841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181 + ... + 1629.

It is an arithmetic number, because the mean of its divisors is an integer number (95175).

2⁶³⁰⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

630845 is a deficient number, since it is larger than the sum of its proper divisors (130555).

630845 is a wasteful number, since it uses less digits than its factorization.

630845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 630845 is about 794.2575149157. The cubic root of 630845 is about 85.7644990174.

The spelling of 630845 in words is "six hundred thirty thousand, eight hundred forty-five".