1220980736 has 104 divisors (see below), whose sum is σ = 2663713200. Its totient is φ = 557383680.

The previous prime is 1220980729. The next prime is 1220980781. The reversal of 1220980736 is 6370890221.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 1220980736.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2256626 + ... + 2257166.

Almost surely, 2^1220980736 is an apocalyptic number.

1220980736 is a gapful number since it is divisible by the number (16) 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 1220980736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1331856600).

1220980736 is an abundant number, since it is smaller than the sum of its proper divisors (1442732464).

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

1220980736 is an equidigital number, since it uses as much as digits as its factorization.

1220980736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1220980736 is about 34942.5347678156. The cubic root of 1220980736 is about 1068.8159773867.

The spelling of 1220980736 in words is "one billion, two hundred twenty million, nine hundred eighty thousand, seven hundred thirty-six".