1220896812 has 24 divisors (see below), whose sum is σ = 2854241712. Its totient is φ = 406182400.

The previous prime is 1220896763. The next prime is 1220896823. The reversal of 1220896812 is 2186980221.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 91389 + ... + 103892.

It is an arithmetic number, because the mean of its divisors is an integer number (118926738).

Almost surely, 2^1220896812 is an apocalyptic number.

1220896812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220896812 is an abundant number, since it is smaller than the sum of its proper divisors (1633344900).

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

1220896812 is a wasteful number, since it uses less digits than its factorization.

1220896812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195809 (or 195807 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1220896812 is about 34941.3338612023. Note that the first 3 decimals coincide. The cubic root of 1220896812 is about 1068.7914885026.

The spelling of 1220896812 in words is "one billion, two hundred twenty million, eight hundred ninety-six thousand, eight hundred twelve".