1816872 has 16 divisors (see below), whose sum is σ = 4542240. Its totient is φ = 605616.

The previous prime is 1816861. The next prime is 1816901. The reversal of 1816872 is 2786181.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 37828 + ... + 37875.

It is an arithmetic number, because the mean of its divisors is an integer number (283890).

2^1816872 is an apocalyptic number.

1816872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1816872 is an abundant number, since it is smaller than the sum of its proper divisors (2725368).

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

1816872 is a wasteful number, since it uses less digits than its factorization.

1816872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75712 (or 75708 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 1816872 is about 1347.9139438406. The cubic root of 1816872 is about 122.0229285939.

The spelling of 1816872 in words is "one million, eight hundred sixteen thousand, eight hundred seventy-two".