630364644 has 144 divisors (see below), whose sum is σ = 1970562048. Its totient is φ = 165452544.

The previous prime is 630364643. The next prime is 630364723. The reversal of 630364644 is 446463036.

630364644 is a `hidden beast` number, since 6 + 3 + 0 + 3 + 6 + 4 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 630364599 and 630364608.

It is not an unprimeable number, because it can be changed into a prime (630364643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1038189 + ... + 1038795.

Almost surely, 2^630364644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630364644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985281024).

630364644 is an abundant number, since it is smaller than the sum of its proper divisors (1340197404).

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

630364644 is a wasteful number, since it uses less digits than its factorization.

630364644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The square root of 630364644 is about 25107.0636275929. The cubic root of 630364644 is about 857.4272507251.

The spelling of 630364644 in words is "six hundred thirty million, three hundred sixty-four thousand, six hundred forty-four".