1081164384 has 144 divisors (see below), whose sum is σ = 3157382592. Its totient is φ = 350797824.

The previous prime is 1081164377. The next prime is 1081164397. The reversal of 1081164384 is 4834611801.

It is a happy number.

1081164384 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 1 + 643 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2945769 + ... + 2946135.

It is an arithmetic number, because the mean of its divisors is an integer number (21926268).

Almost surely, 2^1081164384 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 1081164384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578691296).

1081164384 is an abundant number, since it is smaller than the sum of its proper divisors (2076218208).

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

1081164384 is a wasteful number, since it uses less digits than its factorization.

1081164384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1081164384 is about 32881.0642163541. The cubic root of 1081164384 is about 1026.3541519903.

The spelling of 1081164384 in words is "one billion, eighty-one million, one hundred sixty-four thousand, three hundred eighty-four".