1816136 has 48 divisors (see below), whose sum is σ = 4093740. Its totient is φ = 752640.

The previous prime is 1816121. The next prime is 1816141. The reversal of 1816136 is 6316181.

1816136 = 168² + 169² + ... + 216².

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 592900 = 1106^2 + 770^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 16016 + ... + 16128.

2^1816136 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 1816136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2046870).

1816136 is an abundant number, since it is smaller than the sum of its proper divisors (2277604).

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

1816136 is a wasteful number, since it uses less digits than its factorization.

1816136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 163 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 1816136 is about 1347.6409017242. The cubic root of 1816136 is about 122.0064495381.

It can be divided in two parts, 18161 and 36, that multiplied together give a triangular number (653796 = T₁₁₄₃).

The spelling of 1816136 in words is "one million, eight hundred sixteen thousand, one hundred thirty-six".