630436 has 9 divisors (see below), whose sum is σ = 1106049. Its totient is φ = 314424.

The previous prime is 630433. The next prime is 630451. The reversal of 630436 is 634036.

The square root of 630436 is 794.

It is a perfect power (a square), and thus also a powerful number.

630436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 207936 = 650^2 + 456^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630433) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1390 + ... + 1786.

2⁶³⁰⁴³⁶ is an apocalyptic number.

630436 is the 794-th square number.

It is an amenable number.

630436 is a deficient number, since it is larger than the sum of its proper divisors (475613).

630436 is an equidigital number, since it uses as much as digits as its factorization.

630436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The cubic root of 630436 is about 85.7459602513.

Multiplying 630436 by its product of nonzero digits (1296), we get a square (817045056 = 28584²).

Subtracting 630436 from its reverse (634036), we obtain a square (3600 = 60²).

The spelling of 630436 in words is "six hundred thirty thousand, four hundred thirty-six".