1220987196 has 360 divisors, whose sum is σ = 4011893424. Its totient is φ = 319127040.

The previous prime is 1220987191. The next prime is 1220987233. The reversal of 1220987196 is 6917890221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220987191) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 16725816 + ... + 16725888.

Almost surely, 2^1220987196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220987196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005946712).

1220987196 is an abundant number, since it is smaller than the sum of its proper divisors (2790906228).

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

1220987196 is a wasteful number, since it uses less digits than its factorization.

1220987196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1220987196 is about 34942.6272051773. The cubic root of 1220987196 is about 1068.8178623575.

The spelling of 1220987196 in words is "one billion, two hundred twenty million, nine hundred eighty-seven thousand, one hundred ninety-six".