1804680 has 80 divisors (see below), whose sum is σ = 6076620. Its totient is φ = 480384.

The previous prime is 1804657. The next prime is 1804687. The reversal of 1804680 is 864081.

It can be written as a sum of positive squares in 2 ways, for example, as 1633284 + 171396 = 1278^2 + 414^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1804687) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2962 + ... + 3518.

2^1804680 is an apocalyptic number.

1804680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1804680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3038310).

1804680 is an abundant number, since it is smaller than the sum of its proper divisors (4271940).

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

1804680 is a wasteful number, since it uses less digits than its factorization.

1804680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1804680 is about 1343.3837873073. The cubic root of 1804680 is about 121.7493735096.

The spelling of 1804680 in words is "one million, eight hundred four thousand, six hundred eighty".