1089728515 has 4 divisors (see below), whose sum is σ = 1307674224. Its totient is φ = 871782808.

The previous prime is 1089728503. The next prime is 1089728537. The reversal of 1089728515 is 5158279801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5158279801 = 167 ⋅30887903.

It is a cyclic number.

It is not a de Polignac number, because 1089728515 - 2⁵ = 1089728483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108972847 + ... + 108972856.

It is an arithmetic number, because the mean of its divisors is an integer number (326918556).

Almost surely, 2^1089728515 is an apocalyptic number.

1089728515 is a deficient number, since it is larger than the sum of its proper divisors (217945709).

1089728515 is an equidigital number, since it uses as much as digits as its factorization.

1089728515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217945708.

The product of its (nonzero) digits is 201600, while the sum is 46.

The square root of 1089728515 is about 33011.0362606205. The cubic root of 1089728515 is about 1029.0570170479.

The spelling of 1089728515 in words is "one billion, eighty-nine million, seven hundred twenty-eight thousand, five hundred fifteen".