1165788 has 72 divisors (see below), whose sum is σ = 3302208. Its totient is φ = 344448.

The previous prime is 1165777. The next prime is 1165789. The reversal of 1165788 is 8875611.

It is a super-3 number, since 3×1165788³ = 4753133326765751616, which contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165789) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 21970 + ... + 22022.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2^1165788 is an apocalyptic number.

1165788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651104).

1165788 is an abundant number, since it is smaller than the sum of its proper divisors (2136420).

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

1165788 is a wasteful number, since it uses less digits than its factorization.

1165788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 118 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 1165788 is about 1079.7166294913. The cubic root of 1165788 is about 105.2462248727.

It can be divided in two parts, 1165 and 788, that added together give a triangular number (1953 = T₆₂).

The spelling of 1165788 in words is "one million, one hundred sixty-five thousand, seven hundred eighty-eight".