630311236 has 9 divisors (see below), whose sum is σ = 1103132541. Its totient is φ = 315130512.

The previous prime is 630311221. The next prime is 630311239. The reversal of 630311236 is 632113036.

The square root of 630311236 is 25106.

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

It can be written as a sum of positive squares in only one way, i.e., 628504900 + 1806336 = 25070^2 + 1344^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 630311236.

It is not an unprimeable number, because it can be changed into a prime (630311239) 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, 43936 + ... + 56488.

Almost surely, 2^630311236 is an apocalyptic number.

630311236 is the 25106-th square number.

It is an amenable number.

630311236 is a deficient number, since it is larger than the sum of its proper divisors (472821305).

630311236 is an frugal number, since it uses more digits than its factorization.

630311236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25110 (or 12555 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The cubic root of 630311236 is about 857.4030347054.

Multiplying 630311236 by its sum of digits (25), we get a square (15757780900 = 125530²).

The spelling of 630311236 in words is "six hundred thirty million, three hundred eleven thousand, two hundred thirty-six".