1220897796 has 96 divisors (see below), whose sum is σ = 3054965760. Its totient is φ = 378784896.

The previous prime is 1220897779. The next prime is 1220897813. The reversal of 1220897796 is 6977980221.

It is an interprime number because it is at equal distance from previous prime (1220897779) and next prime (1220897813).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1241521 + ... + 1242503.

It is an arithmetic number, because the mean of its divisors is an integer number (31822560).

Almost surely, 2^1220897796 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 1220897796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527482880).

1220897796 is an abundant number, since it is smaller than the sum of its proper divisors (1834067964).

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

1220897796 is a wasteful number, since it uses less digits than its factorization.

1220897796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 1220897796 is about 34941.3479419441. The cubic root of 1220897796 is about 1068.7917756387.

The spelling of 1220897796 in words is "one billion, two hundred twenty million, eight hundred ninety-seven thousand, seven hundred ninety-six".