1087812864 has 108 divisors (see below), whose sum is σ = 3321048276. Its totient is φ = 341262336.

The previous prime is 1087812851. The next prime is 1087812877. The reversal of 1087812864 is 4682187801.

It is an interprime number because it is at equal distance from previous prime (1087812851) and next prime (1087812877).

It can be written as a sum of positive squares in 2 ways, for example, as 772395264 + 315417600 = 27792^2 + 17760^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25282 + ... + 53054.

It is an arithmetic number, because the mean of its divisors is an integer number (30750447).

Almost surely, 2^1087812864 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 1087812864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1660524138).

1087812864 is an abundant number, since it is smaller than the sum of its proper divisors (2233235412).

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

1087812864 is a wasteful number, since it uses less digits than its factorization.

1087812864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27812 (or 27795 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 1087812864 is about 32982.0081862824. The cubic root of 1087812864 is about 1028.4536648243.

The spelling of 1087812864 in words is "one billion, eighty-seven million, eight hundred twelve thousand, eight hundred sixty-four".