629856 has 60 divisors (see below), whose sum is σ = 1860012. Its totient is φ = 209952.

The previous prime is 629843. The next prime is 629857. The reversal of 629856 is 658926.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (25920) is a multiple of the sum of its prime divisors (5).

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 629856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629857) by changing a digit.

629856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 209951 + 209952 + 209953.

629856 is a Friedman number, since it can be written as (6^8*6)/(9+5+2), using all its digits and the basic arithmetic operations.

2⁶²⁹⁸⁵⁶ 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 629856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930006).

629856 is an abundant number, since it is smaller than the sum of its proper divisors (1230156).

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

629856 is an frugal number, since it uses more digits than its factorization.

629856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37 (or 5 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 629856 is about 793.6346766617. The cubic root of 629856 is about 85.7196568063.

It can be divided in two parts, 629 and 856, that added together give a triangular number (1485 = T₅₄).

The spelling of 629856 in words is "six hundred twenty-nine thousand, eight hundred fifty-six".