1089919656 has 192 divisors, whose sum is σ = 3493726080. Its totient is φ = 300464640.

The previous prime is 1089919601. The next prime is 1089919679. The reversal of 1089919656 is 6569199801.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3934590 + ... + 3934866.

It is an arithmetic number, because the mean of its divisors is an integer number (18196490).

Almost surely, 2^1089919656 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 1089919656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746863040).

1089919656 is an abundant number, since it is smaller than the sum of its proper divisors (2403806424).

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

1089919656 is a wasteful number, since it uses less digits than its factorization.

1089919656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 1089919656 is about 33013.9312412200. The cubic root of 1089919656 is about 1029.1171798883.

The spelling of 1089919656 in words is "one billion, eighty-nine million, nine hundred nineteen thousand, six hundred fifty-six".