1089836 has 48 divisors (see below), whose sum is σ = 2322432. Its totient is φ = 441600.

The previous prime is 1089799. The next prime is 1089841. The reversal of 1089836 is 6389801.

1089836 = T₁ + T₂ + ... + T₁₈₆.

1089836 is a nontrivial binomial coefficient, being equal to C(188, 3).

It is a super-3 number, since 3×1089836³ = 3883333628236527168, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1089796 and 1089805.

It is a congruent number.

It is an unprimeable number.

It is the 186-th tetrahedral 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 15 ways as a sum of consecutive naturals, for example, 23165 + ... + 23211.

It is an arithmetic number, because the mean of its divisors is an integer number (48384).

2^1089836 is an apocalyptic number.

It is an amenable number.

1089836 is an abundant number, since it is smaller than the sum of its proper divisors (1232596).

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

1089836 is a wasteful number, since it uses less digits than its factorization.

1089836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1089836 is about 1043.9521061811. The cubic root of 1089836 is about 102.9090849498.

Subtracting from 1089836 its sum of digits (35), we obtain a palindrome (1089801).

The spelling of 1089836 in words is "one million, eighty-nine thousand, eight hundred thirty-six".