1886904 has 48 divisors (see below), whose sum is σ = 5194800. Its totient is φ = 618624.

The previous prime is 1886903. The next prime is 1886917. The reversal of 1886904 is 4096881.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1886903) 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 11 ways as a sum of consecutive naturals, for example, 5077 + ... + 5435.

It is an arithmetic number, because the mean of its divisors is an integer number (108225).

2^1886904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1886904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597400).

1886904 is an abundant number, since it is smaller than the sum of its proper divisors (3307896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1886904 is a wasteful number, since it uses less digits than its factorization.

1886904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1886904 is about 1373.6462426695. The cubic root of 1886904 is about 123.5710115195.

Subtracting from 1886904 its product of nonzero digits (13824), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 1886904 in words is "one million, eight hundred eighty-six thousand, nine hundred four".