1118089728 has 240 divisors, whose sum is σ = 3906714240. Its totient is φ = 300515328.

The previous prime is 1118089703. The next prime is 1118089733. The reversal of 1118089728 is 8279808111.

It is a happy number.

It is a super-2 number, since 2×1118089728² = 2500249279718227968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 547333 + ... + 549371.

It is an arithmetic number, because the mean of its divisors is an integer number (16277976).

Almost surely, 2^1118089728 is an apocalyptic number.

1118089728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1118089728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1953357120).

1118089728 is an abundant number, since it is smaller than the sum of its proper divisors (2788624512).

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

1118089728 is a wasteful number, since it uses less digits than its factorization.

1118089728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087 (or 2068 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The square root of 1118089728 is about 33437.8487346300. The cubic root of 1118089728 is about 1037.9080631817.

The spelling of 1118089728 in words is "one billion, one hundred eighteen million, eighty-nine thousand, seven hundred twenty-eight".