1089888890 has 8 divisors (see below), whose sum is σ = 1961800020. Its totient is φ = 435955552.

The previous prime is 1089888889. The next prime is 1089888901. The reversal of 1089888890 is 988889801.

It can be written as a sum of positive squares in 2 ways, for example, as 1063868689 + 26020201 = 32617^2 + 5101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 54494435 + ... + 54494454.

Almost surely, 2^1089888890 is an apocalyptic number.

1089888890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1089888890 is a deficient number, since it is larger than the sum of its proper divisors (871911130).

1089888890 is a wasteful number, since it uses less digits than its factorization.

1089888890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108988896.

The product of its (nonzero) digits is 2654208, while the sum is 59.

The square root of 1089888890 is about 33013.4652831235. The cubic root of 1089888890 is about 1029.1074965700.

The spelling of 1089888890 in words is "one billion, eighty-nine million, eight hundred eighty-eight thousand, eight hundred ninety".