2185040 has 80 divisors (see below), whose sum is σ = 5999616. Its totient is φ = 729600.

The previous prime is 2185037. The next prime is 2185091. The reversal of 2185040 is 405812.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11345 + ... + 11535.

2^2185040 is an apocalyptic number.

2185040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2185040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2999808).

2185040 is an abundant number, since it is smaller than the sum of its proper divisors (3814576).

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

2185040 is a wasteful number, since it uses less digits than its factorization.

2185040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2185040 is about 1478.1880800494. The cubic root of 2185040 is about 129.7636732063.

The spelling of 2185040 in words is "two million, one hundred eighty-five thousand, forty".