1089888915 has 16 divisors (see below), whose sum is σ = 1744249248. Its totient is φ = 581131776.

The previous prime is 1089888913. The next prime is 1089888923. The reversal of 1089888915 is 5198889801.

It is not a de Polignac number, because 1089888915 - 2¹ = 1089888913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1089888913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89577 + ... + 101013.

It is an arithmetic number, because the mean of its divisors is an integer number (109015578).

Almost surely, 2^1089888915 is an apocalyptic number.

1089888915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1089888915 is a deficient number, since it is larger than the sum of its proper divisors (654360333).

1089888915 is a wasteful number, since it uses less digits than its factorization.

1089888915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17798.

The product of its (nonzero) digits is 1658880, while the sum is 57.

The square root of 1089888915 is about 33013.4656617569. The cubic root of 1089888915 is about 1029.1075044386.

The spelling of 1089888915 in words is "one billion, eighty-nine million, eight hundred eighty-eight thousand, nine hundred fifteen".