1087881816 has 128 divisors (see below), whose sum is σ = 3353633280. Its totient is φ = 286980096.

The previous prime is 1087881797. The next prime is 1087881827. The reversal of 1087881816 is 6181887801.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 147775 + ... + 154961.

It is an arithmetic number, because the mean of its divisors is an integer number (26200260).

Almost surely, 2^1087881816 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 1087881816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1676816640).

1087881816 is an abundant number, since it is smaller than the sum of its proper divisors (2265751464).

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

1087881816 is a wasteful number, since it uses less digits than its factorization.

1087881816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7273 (or 7269 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 48.

The square root of 1087881816 is about 32983.0534668942. The cubic root of 1087881816 is about 1028.4753941864.

The spelling of 1087881816 in words is "one billion, eighty-seven million, eight hundred eighty-one thousand, eight hundred sixteen".