1087764864 has 64 divisors (see below), whose sum is σ = 2904698880. Its totient is φ = 360665600.

The previous prime is 1087764863. The next prime is 1087764913. The reversal of 1087764864 is 4684677801.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087764863) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 65929 + ... + 80759.

It is an arithmetic number, because the mean of its divisors is an integer number (45385920).

Almost surely, 2^1087764864 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 1087764864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452349440).

1087764864 is an abundant number, since it is smaller than the sum of its proper divisors (1816934016).

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

1087764864 is a wasteful number, since it uses less digits than its factorization.

1087764864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15039 (or 15027 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The square root of 1087764864 is about 32981.2805087977. The cubic root of 1087764864 is about 1028.4385376814.

The spelling of 1087764864 in words is "one billion, eighty-seven million, seven hundred sixty-four thousand, eight hundred sixty-four".