671198220 has 288 divisors, whose sum is σ = 2574673920. Its totient is φ = 137479680.

The previous prime is 671198197. The next prime is 671198251. The reversal of 671198220 is 22891176.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1094634 + ... + 1095246.

It is an arithmetic number, because the mean of its divisors is an integer number (8939840).

Almost surely, 2^671198220 is an apocalyptic number.

671198220 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 671198220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287336960).

671198220 is an abundant number, since it is smaller than the sum of its proper divisors (1903475700).

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

671198220 is a wasteful number, since it uses less digits than its factorization.

671198220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 671198220 is about 25907.4935105656. The cubic root of 671198220 is about 875.5553350907. Note that the first 3 decimals are identical.

It can be divided in two parts, 671 and 198220, that added together give a palindrome (198891).

The spelling of 671198220 in words is "six hundred seventy-one million, one hundred ninety-eight thousand, two hundred twenty".