671828220 has 324 divisors, whose sum is σ = 2513786184. Its totient is φ = 144789120.

The previous prime is 671828177. The next prime is 671828237. The reversal of 671828220 is 22828176.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 3183915 + ... + 3184125.

Almost surely, 2^671828220 is an apocalyptic number.

671828220 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 671828220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256893092).

671828220 is an abundant number, since it is smaller than the sum of its proper divisors (1841957964).

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

671828220 is a wasteful number, since it uses less digits than its factorization.

671828220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 671828220 is about 25919.6493031831. The cubic root of 671828220 is about 875.8291873119.

The spelling of 671828220 in words is "six hundred seventy-one million, eight hundred twenty-eight thousand, two hundred twenty".