1089569620 has 12 divisors (see below), whose sum is σ = 2288096244. Its totient is φ = 435827840.

The previous prime is 1089569609. The next prime is 1089569633. The reversal of 1089569620 is 269659801.

It can be written as a sum of positive squares in 2 ways, for example, as 170145936 + 919423684 = 13044^2 + 30322^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27239221 + ... + 27239260.

It is an arithmetic number, because the mean of its divisors is an integer number (190674687).

Almost surely, 2^1089569620 is an apocalyptic number.

1089569620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1089569620 is an abundant number, since it is smaller than the sum of its proper divisors (1198526624).

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

1089569620 is a wasteful number, since it uses less digits than its factorization.

1089569620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54478490 (or 54478488 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1089569620 is about 33008.6294777593. The cubic root of 1089569620 is about 1029.0069984851.

The spelling of 1089569620 in words is "one billion, eighty-nine million, five hundred sixty-nine thousand, six hundred twenty".