2378405 has 4 divisors (see below), whose sum is σ = 2854092. Its totient is φ = 1902720.

The previous prime is 2378399. The next prime is 2378423. The reversal of 2378405 is 5048732.

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 1196836 + 1181569 = 1094^2 + 1087^2 .

It is not a de Polignac number, because 2378405 - 2¹⁰ = 2377381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237836 + ... + 237845.

It is an arithmetic number, because the mean of its divisors is an integer number (713523).

2^2378405 is an apocalyptic number.

It is an amenable number.

2378405 is a deficient number, since it is larger than the sum of its proper divisors (475687).

2378405 is an equidigital number, since it uses as much as digits as its factorization.

2378405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475686.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 2378405 is about 1542.2078329460. The cubic root of 2378405 is about 133.4838127446.

The spelling of 2378405 in words is "two million, three hundred seventy-eight thousand, four hundred five".