1845840 has 40 divisors (see below), whose sum is σ = 5722848. Its totient is φ = 492160.

The previous prime is 1845829. The next prime is 1845841. The reversal of 1845840 is 485481.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1845798 and 1845807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606 + ... + 4085.

2^1845840 is an apocalyptic number.

1845840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1845840 is an abundant number, since it is smaller than the sum of its proper divisors (3877008).

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

1845840 is a wasteful number, since it uses less digits than its factorization.

1845840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7707 (or 7701 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 1845840 is about 1358.6169438072. The cubic root of 1845840 is about 122.6680187837.

The spelling of 1845840 in words is "one million, eight hundred forty-five thousand, eight hundred forty".