630881 has 8 divisors (see below), whose sum is σ = 666624. Its totient is φ = 596160.

The previous prime is 630871. The next prime is 630893. The reversal of 630881 is 188036.

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 630881 - 2¹⁰ = 629857 is a prime.

It is a super-2 number, since 2×630881² = 796021672322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 630881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (83328).

2⁶³⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

630881 is a deficient number, since it is larger than the sum of its proper divisors (35743).

630881 is a wasteful number, since it uses less digits than its factorization.

630881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 630881 is about 794.2801772674. The cubic root of 630881 is about 85.7661304077.

The spelling of 630881 in words is "six hundred thirty thousand, eight hundred eighty-one".