630823881 has 8 divisors (see below), whose sum is σ = 849426624. Its totient is φ = 416385200.

The previous prime is 630823877. The next prime is 630823891. The reversal of 630823881 is 188328036.

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 630823881 - 2² = 630823877 is a prime.

It is a super-2 number, since 2×630823881² = 795877537679804322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (630823871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040661 + ... + 1041266.

It is an arithmetic number, because the mean of its divisors is an integer number (106178328).

Almost surely, 2^630823881 is an apocalyptic number.

It is an amenable number.

630823881 is a deficient number, since it is larger than the sum of its proper divisors (218602743).

630823881 is a wasteful number, since it uses less digits than its factorization.

630823881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082031.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 630823881 is about 25116.2075361707. The cubic root of 630823881 is about 857.6354195148.

The spelling of 630823881 in words is "six hundred thirty million, eight hundred twenty-three thousand, eight hundred eighty-one".