1810872 has 48 divisors (see below), whose sum is σ = 5606640. Its totient is φ = 517248.

The previous prime is 1810867. The next prime is 1810877. The reversal of 1810872 is 2780181.

It is an interprime number because it is at equal distance from previous prime (1810867) and next prime (1810877).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1810877) 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 11 ways as a sum of consecutive naturals, for example, 1293 + ... + 2300.

It is an arithmetic number, because the mean of its divisors is an integer number (116805).

2^1810872 is an apocalyptic number.

1810872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1810872 is an abundant number, since it is smaller than the sum of its proper divisors (3795768).

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

1810872 is a wasteful number, since it uses less digits than its factorization.

1810872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612 (or 3605 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1810872 is about 1345.6864419321. The cubic root of 1810872 is about 121.8884584743. Note that the first 3 decimals are identical.

The spelling of 1810872 in words is "one million, eight hundred ten thousand, eight hundred seventy-two".