1220298660 has 144 divisors (see below), whose sum is σ = 4288642176. Its totient is φ = 275083776.

The previous prime is 1220298631. The next prime is 1220298683. The reversal of 1220298660 is 668920221.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 85347 + ... + 98613.

Almost surely, 2^1220298660 is an apocalyptic number.

1220298660 is a gapful number since it is divisible by the number (10) 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 1220298660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2144321088).

1220298660 is an abundant number, since it is smaller than the sum of its proper divisors (3068343516).

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

1220298660 is a wasteful number, since it uses less digits than its factorization.

1220298660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13362 (or 13357 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1220298660 is about 34932.7734369889. The cubic root of 1220298660 is about 1068.6169162286.

The spelling of 1220298660 in words is "one billion, two hundred twenty million, two hundred ninety-eight thousand, six hundred sixty".