1089856064 has 56 divisors (see below), whose sum is σ = 2364260448. Its totient is φ = 494346240.

The previous prime is 1089856037. The next prime is 1089856067. The reversal of 1089856064 is 4606589801.

It is not an unprimeable number, because it can be changed into a prime (1089856067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404867 + ... + 407549.

Almost surely, 2^1089856064 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 1089856064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1182130224).

1089856064 is an abundant number, since it is smaller than the sum of its proper divisors (1274404384).

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

1089856064 is a wasteful number, since it uses less digits than its factorization.

1089856064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283 (or 3273 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 1089856064 is about 33012.9681186045. The cubic root of 1089856064 is about 1029.0971646844.

The spelling of 1089856064 in words is "one billion, eighty-nine million, eight hundred fifty-six thousand, sixty-four".