1985804 has 48 divisors (see below), whose sum is σ = 4082400. Its totient is φ = 838656.

The previous prime is 1985803. The next prime is 1985849. The reversal of 1985804 is 4085891.

It is not an unprimeable number, because it can be changed into a prime (1985803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37442 + ... + 37494.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2^1985804 is an apocalyptic number.

It is an amenable number.

1985804 is an abundant number, since it is smaller than the sum of its proper divisors (2096596).

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

1985804 is a wasteful number, since it uses less digits than its factorization.

1985804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1985804 is about 1409.1855803974. The cubic root of 1985804 is about 125.6932995764.

The spelling of 1985804 in words is "one million, nine hundred eighty-five thousand, eight hundred four".