2400085 has 4 divisors (see below), whose sum is σ = 2880108. Its totient is φ = 1920064.

The previous prime is 2400067. The next prime is 2400089. The reversal of 2400085 is 5800042.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 400689 + 1999396 = 633^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400085 - 2⁵ = 2400053 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400089) 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, 240004 + ... + 240013.

It is an arithmetic number, because the mean of its divisors is an integer number (720027).

2^2400085 is an apocalyptic number.

It is an amenable number.

2400085 is a deficient number, since it is larger than the sum of its proper divisors (480023).

2400085 is an equidigital number, since it uses as much as digits as its factorization.

2400085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480022.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2400085 is about 1549.2207718721. The cubic root of 2400085 is about 133.8881706034. Note that the first 3 decimals are identical.

The spelling of 2400085 in words is "two million, four hundred thousand, eighty-five".