1858444 has 12 divisors (see below), whose sum is σ = 3716944. Its totient is φ = 796464.

The previous prime is 1858433. The next prime is 1858459. The reversal of 1858444 is 4448581.

1858444 is an admirable number.

It is a super-2 number, since 2×1858444² = 6907628202272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 33159 + ... + 33214.

2^1858444 is an apocalyptic number.

1858444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1858444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1858444 is a wasteful number, since it uses less digits than its factorization.

1858444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66384 (or 66382 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 1858444 is about 1363.2475930659. The cubic root of 1858444 is about 122.9465914819.

The spelling of 1858444 in words is "one million, eight hundred fifty-eight thousand, four hundred forty-four".