630448861 has 8 divisors (see below), whose sum is σ = 758434880. Its totient is φ = 511943328.

The previous prime is 630448853. The next prime is 630448901. The reversal of 630448861 is 168844036.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 630448861 - 2³ = 630448853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630448811) 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 7 ways as a sum of consecutive naturals, for example, 2369976 + ... + 2370241.

It is an arithmetic number, because the mean of its divisors is an integer number (94804360).

Almost surely, 2^630448861 is an apocalyptic number.

It is an amenable number.

630448861 is a deficient number, since it is larger than the sum of its proper divisors (127986019).

630448861 is a wasteful number, since it uses less digits than its factorization.

630448861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740243.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 630448861 is about 25108.7407290768. The cubic root of 630448861 is about 857.4654332469.

The spelling of 630448861 in words is "six hundred thirty million, four hundred forty-eight thousand, eight hundred sixty-one".