2400009 has 8 divisors (see below), whose sum is σ = 3388320. Its totient is φ = 1505856.

The previous prime is 2400001. The next prime is 2400019. The reversal of 2400009 is 9000042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2400009 - 2³ = 2400001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2400001) 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, 23479 + ... + 23580.

It is an arithmetic number, because the mean of its divisors is an integer number (423540).

2^2400009 is an apocalyptic number.

It is an amenable number.

2400009 is a deficient number, since it is larger than the sum of its proper divisors (988311).

2400009 is a wasteful number, since it uses less digits than its factorization.

2400009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47079.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2400009 is about 1549.1962432178. The cubic root of 2400009 is about 133.8867573745.

The spelling of 2400009 in words is "two million, four hundred thousand, nine".