1818444 has 12 divisors (see below), whose sum is σ = 4243064. Its totient is φ = 606144.

The previous prime is 1818437. The next prime is 1818451. The reversal of 1818444 is 4448181.

It is an interprime number because it is at equal distance from previous prime (1818437) and next prime (1818451).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1818444² = 6613477162272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75757 + ... + 75780.

2^1818444 is an apocalyptic number.

It is an amenable number.

1818444 is an abundant number, since it is smaller than the sum of its proper divisors (2424620).

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

1818444 is a wasteful number, since it uses less digits than its factorization.

1818444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151544 (or 151542 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 1818444 is about 1348.4969410421. The cubic root of 1818444 is about 122.0581108096.

The spelling of 1818444 in words is "one million, eight hundred eighteen thousand, four hundred forty-four".