1808442 has 12 divisors (see below), whose sum is σ = 3918330. Its totient is φ = 602808.

The previous prime is 1808431. The next prime is 1808453. The reversal of 1808442 is 2448081.

It is an interprime number because it is at equal distance from previous prime (1808431) and next prime (1808453).

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 622521 = 1089^2 + 789^2 .

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 5 ways as a sum of consecutive naturals, for example, 50217 + ... + 50252.

2^1808442 is an apocalyptic number.

1808442 is an abundant number, since it is smaller than the sum of its proper divisors (2109888).

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

1808442 is a wasteful number, since it uses less digits than its factorization.

1808442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100477 (or 100474 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 1808442 is about 1344.7832539112. The cubic root of 1808442 is about 121.8339135667.

It can be divided in two parts, 18084 and 42, that multiplied together give a triangular number (759528 = T₁₂₃₂).

The spelling of 1808442 in words is "one million, eight hundred eight thousand, four hundred forty-two".