1878385 has 8 divisors (see below), whose sum is σ = 2275776. Its totient is φ = 1488240.

The previous prime is 1878367. The next prime is 1878389. The reversal of 1878385 is 5838781.

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

It is not a de Polignac number, because 1878385 - 2⁵ = 1878353 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221 + ... + 2290.

It is an arithmetic number, because the mean of its divisors is an integer number (284472).

2^1878385 is an apocalyptic number.

It is an amenable number.

1878385 is a deficient number, since it is larger than the sum of its proper divisors (397391).

1878385 is a wasteful number, since it uses less digits than its factorization.

1878385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623.

The product of its digits is 53760, while the sum is 40.

The square root of 1878385 is about 1370.5418636437. The cubic root of 1878385 is about 123.3847646871.

The spelling of 1878385 in words is "one million, eight hundred seventy-eight thousand, three hundred eighty-five".