630340 has 12 divisors (see below), whose sum is σ = 1323756. Its totient is φ = 252128.

The previous prime is 630319. The next prime is 630349. The reversal of 630340 is 43036.

630340 = T₂₄₁ + T₂₄₂ + ... + T₂₆₀.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 484416 = 382^2 + 696^2 .

It is not an unprimeable number, because it can be changed into a prime (630349) by changing a digit.

630340 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15739 + ... + 15778.

It is an arithmetic number, because the mean of its divisors is an integer number (110313).

2⁶³⁰³⁴⁰ is an apocalyptic number.

It is an amenable number.

630340 is an abundant number, since it is smaller than the sum of its proper divisors (693416).

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

630340 is a wasteful number, since it uses less digits than its factorization.

630340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31526 (or 31524 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 630340 is about 793.9395442979. The cubic root of 630340 is about 85.7416076921.

Adding to 630340 its reverse (43036), we get a palindrome (673376).

The spelling of 630340 in words is "six hundred thirty thousand, three hundred forty".