6629820 has 48 divisors (see below), whose sum is σ = 18966528. Its totient is φ = 1729600.

The previous prime is 6629807. The next prime is 6629873. The reversal of 6629820 is 289266.

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, 1645 + ... + 3995.

It is an arithmetic number, because the mean of its divisors is an integer number (395136).

Almost surely, 2^6629820 is an apocalyptic number.

6629820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6629820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9483264).

6629820 is an abundant number, since it is smaller than the sum of its proper divisors (12336708).

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

6629820 is a wasteful number, since it uses less digits than its factorization.

6629820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2408 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6629820 is about 2574.8436845758. The cubic root of 6629820 is about 187.8598245873.

The spelling of 6629820 in words is "six million, six hundred twenty-nine thousand, eight hundred twenty".