1878404 has 18 divisors (see below), whose sum is σ = 3614142. Its totient is φ = 853600.

The previous prime is 1878403. The next prime is 1878419. The reversal of 1878404 is 4048781.

It can be written as a sum of positive squares in only one way, i.e., 1684804 + 193600 = 1298^2 + 440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1457 + ... + 2424.

2^1878404 is an apocalyptic number.

It is an amenable number.

1878404 is a deficient number, since it is larger than the sum of its proper divisors (1735738).

1878404 is a wasteful number, since it uses less digits than its factorization.

1878404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907 (or 3894 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 1878404 is about 1370.5487951912. The cubic root of 1878404 is about 123.3851807009.

The spelling of 1878404 in words is "one million, eight hundred seventy-eight thousand, four hundred four".