629968864 has 96 divisors (see below), whose sum is σ = 1579979520. Its totient is φ = 240703488.

The previous prime is 629968853. The next prime is 629968957. The reversal of 629968864 is 468869926.

It is a junction number, because it is equal to n+sod(n) for n = 629968799 and 629968808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67999 + ... + 76705.

It is an arithmetic number, because the mean of its divisors is an integer number (16458120).

Almost surely, 2^629968864 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 629968864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789989760).

629968864 is an abundant number, since it is smaller than the sum of its proper divisors (950010656).

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

629968864 is a wasteful number, since it uses less digits than its factorization.

629968864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8760 (or 8752 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 58.

The square root of 629968864 is about 25099.1805443923. The cubic root of 629968864 is about 857.2477654028.

The spelling of 629968864 in words is "six hundred twenty-nine million, nine hundred sixty-eight thousand, eight hundred sixty-four".