630920 has 16 divisors (see below), whose sum is σ = 1419660. Its totient is φ = 252352.

The previous prime is 630919. The next prime is 630941. The reversal of 630920 is 29036.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 630436 + 484 = 794^2 + 22^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 630892 and 630901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7847 + ... + 7926.

2⁶³⁰⁹²⁰ is an apocalyptic number.

It is an amenable number.

630920 is an abundant number, since it is smaller than the sum of its proper divisors (788740).

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

630920 is a wasteful number, since it uses less digits than its factorization.

630920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15784 (or 15780 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 630920 is about 794.3047274189. The cubic root of 630920 is about 85.7678976771.

Adding to 630920 its reverse (29036), we get a palindrome (659956).

The spelling of 630920 in words is "six hundred thirty thousand, nine hundred twenty".