1183864 has 24 divisors (see below), whose sum is σ = 2441880. Its totient is φ = 537680.

The previous prime is 1183843. The next prime is 1183877. The reversal of 1183864 is 4683811.

1183864 = T₃₁₇ + T₃₁₈ + ... + T₃₃₈.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357 + ... + 1579.

It is an arithmetic number, because the mean of its divisors is an integer number (101745).

2^1183864 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 1183864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220940).

1183864 is an abundant number, since it is smaller than the sum of its proper divisors (1258016).

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

1183864 is a wasteful number, since it uses less digits than its factorization.

1183864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1236 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 1183864 is about 1088.0551456613. The cubic root of 1183864 is about 105.7873987253.

The spelling of 1183864 in words is "one million, one hundred eighty-three thousand, eight hundred sixty-four".