1091826864 has 100 divisors (see below), whose sum is σ = 3167494440. Its totient is φ = 363087360.

The previous prime is 1091826863. The next prime is 1091826881. The reversal of 1091826864 is 4686281901.

It is a super-3 number, since 3×1091826864³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1091826863) 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 19 ways as a sum of consecutive naturals, for example, 801544 + ... + 802904.

Almost surely, 2^1091826864 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 1091826864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1583747220).

1091826864 is an abundant number, since it is smaller than the sum of its proper divisors (2075667576).

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

1091826864 is a wasteful number, since it uses less digits than its factorization.

1091826864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000 (or 1985 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1091826864 is about 33042.8035130193. The cubic root of 1091826864 is about 1029.7171008024.

The spelling of 1091826864 in words is "one billion, ninety-one million, eight hundred twenty-six thousand, eight hundred sixty-four".