1005804 has 48 divisors (see below), whose sum is σ = 2665600. Its totient is φ = 327888.

The previous prime is 1005761. The next prime is 1005821. The reversal of 1005804 is 4085001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7167 + ... + 7305.

2^1005804 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 1005804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332800).

1005804 is an abundant number, since it is smaller than the sum of its proper divisors (1659796).

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

1005804 is a wasteful number, since it uses less digits than its factorization.

1005804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1005804 is about 1002.8978013736. The cubic root of 1005804 is about 100.1930935754.

The spelling of 1005804 in words is "one million, five thousand, eight hundred four".