1089888904 has 96 divisors (see below), whose sum is σ = 2416606920. Its totient is φ = 456486912.

The previous prime is 1089888901. The next prime is 1089888913. The reversal of 1089888904 is 4098889801.

It can be written as a sum of positive squares in 12 ways, for example, as 439740900 + 650148004 = 20970^2 + 25498^2 .

It is not an unprimeable number, because it can be changed into a prime (1089888901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1486522 + ... + 1487254.

Almost surely, 2^1089888904 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 1089888904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208303460).

1089888904 is an abundant number, since it is smaller than the sum of its proper divisors (1326718016).

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

1089888904 is a wasteful number, since it uses less digits than its factorization.

1089888904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 55.

The square root of 1089888904 is about 33013.4654951582. The cubic root of 1089888904 is about 1029.1075009764.

The spelling of 1089888904 in words is "one billion, eighty-nine million, eight hundred eighty-eight thousand, nine hundred four".