630699944 has 64 divisors (see below), whose sum is σ = 1385372160. Its totient is φ = 263609280.

The previous prime is 630699941. The next prime is 630699959. The reversal of 630699944 is 449996036.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 630699892 and 630699901.

It is not an unprimeable number, because it can be changed into a prime (630699941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400679 + ... + 402249.

It is an arithmetic number, because the mean of its divisors is an integer number (21646440).

Almost surely, 2^630699944 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 630699944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692686080).

630699944 is an abundant number, since it is smaller than the sum of its proper divisors (754672216).

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

630699944 is a wasteful number, since it uses less digits than its factorization.

630699944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 50.

The square root of 630699944 is about 25113.7401435947. The cubic root of 630699944 is about 857.5792497311.

The spelling of 630699944 in words is "six hundred thirty million, six hundred ninety-nine thousand, nine hundred forty-four".