1844240 has 20 divisors (see below), whose sum is σ = 4288044. Its totient is φ = 737664.

The previous prime is 1844207. The next prime is 1844243. The reversal of 1844240 is 424481.

It can be written as a sum of positive squares in 2 ways, for example, as 1048576 + 795664 = 1024^2 + 892^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1844243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11447 + ... + 11606.

2^1844240 is an apocalyptic number.

1844240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1844240 is an abundant number, since it is smaller than the sum of its proper divisors (2443804).

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

1844240 is a wasteful number, since it uses less digits than its factorization.

1844240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23066 (or 23060 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1844240 is about 1358.0279820387. The cubic root of 1844240 is about 122.6325650847.

The spelling of 1844240 in words is "one million, eight hundred forty-four thousand, two hundred forty".