1816002 has 24 divisors (see below), whose sum is σ = 3960684. Its totient is φ = 601344.

The previous prime is 1815977. The next prime is 1816007. The reversal of 1816002 is 2006181.

It can be written as a sum of positive squares in 2 ways, for example, as 1565001 + 251001 = 1251^2 + 501^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1816007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3978 + ... + 4410.

2^1816002 is an apocalyptic number.

1816002 is an abundant number, since it is smaller than the sum of its proper divisors (2144682).

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

1816002 is a wasteful number, since it uses less digits than its factorization.

1816002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1816002 is about 1347.5911842989. The cubic root of 1816002 is about 122.0034487962.

It can be divided in two parts, 1 and 816002, that added together give a triangular number (816003 = T₁₂₇₇).

The spelling of 1816002 in words is "one million, eight hundred sixteen thousand, two".