2400305 has 4 divisors (see below), whose sum is σ = 2880372. Its totient is φ = 1920240.

The previous prime is 2400283. The next prime is 2400311. The reversal of 2400305 is 5030042.

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 303601 + 2096704 = 551^2 + 1448^2 .

It is not a de Polignac number, because 2400305 - 2¹⁴ = 2383921 is a prime.

It is a super-2 number, since 2×2400305² = 11522928186050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2400305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240026 + ... + 240035.

It is an arithmetic number, because the mean of its divisors is an integer number (720093).

2^2400305 is an apocalyptic number.

It is an amenable number.

2400305 is a deficient number, since it is larger than the sum of its proper divisors (480067).

2400305 is an equidigital number, since it uses as much as digits as its factorization.

2400305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480066.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 2400305 is about 1549.2917736824. The cubic root of 2400305 is about 133.8922613609.

Adding to 2400305 its reverse (5030042), we get a palindrome (7430347).

The spelling of 2400305 in words is "two million, four hundred thousand, three hundred five".