2398405 has 8 divisors (see below), whose sum is σ = 2905632. Its totient is φ = 1900368.

The previous prime is 2398391. The next prime is 2398423. The reversal of 2398405 is 5048932.

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

It is a cyclic number.

It is not a de Polignac number, because 2398405 - 2¹⁵ = 2365637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1707 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (363204).

2^2398405 is an apocalyptic number.

It is an amenable number.

2398405 is a deficient number, since it is larger than the sum of its proper divisors (507227).

2398405 is a wasteful number, since it uses less digits than its factorization.

2398405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2398405 is about 1548.6784688889. The cubic root of 2398405 is about 133.8569238448.

The spelling of 2398405 in words is "two million, three hundred ninety-eight thousand, four hundred five".