1289296220 has 24 divisors (see below), whose sum is σ = 2709026208. Its totient is φ = 515432000.

The previous prime is 1289296199. The next prime is 1289296237. The reversal of 1289296220 is 226929821.

It is a congruent number.

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, 21065 + ... + 54975.

It is an arithmetic number, because the mean of its divisors is an integer number (112876092).

Almost surely, 2^1289296220 is an apocalyptic number.

1289296220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1289296220 is an abundant number, since it is smaller than the sum of its proper divisors (1419729988).

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

1289296220 is a wasteful number, since it uses less digits than its factorization.

1289296220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35821 (or 35819 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1289296220 is about 35906.7712277225. The cubic root of 1289296220 is about 1088.3892320861.

The spelling of 1289296220 in words is "one billion, two hundred eighty-nine million, two hundred ninety-six thousand, two hundred twenty".