2378389 has 4 divisors (see below), whose sum is σ = 2561356. Its totient is φ = 2195424.

The previous prime is 2378371. The next prime is 2378399. The reversal of 2378389 is 9838732.

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 324900 + 2053489 = 570^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 2378389 - 2⁵ = 2378357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2378359) 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, 91464 + ... + 91489.

It is an arithmetic number, because the mean of its divisors is an integer number (640339).

2^2378389 is an apocalyptic number.

It is an amenable number.

2378389 is a deficient number, since it is larger than the sum of its proper divisors (182967).

2378389 is a wasteful number, since it uses less digits than its factorization.

2378389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182966.

The product of its digits is 72576, while the sum is 40.

The square root of 2378389 is about 1542.2026455690. The cubic root of 2378389 is about 133.4835134199.

The spelling of 2378389 in words is "two million, three hundred seventy-eight thousand, three hundred eighty-nine".