1804140 has 96 divisors (see below), whose sum is σ = 6068160. Its totient is φ = 442368.

The previous prime is 1804139. The next prime is 1804199. The reversal of 1804140 is 414081.

It is a super-2 number, since 2×1804140² = 6509842279200, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 6892 + ... + 7148.

It is an arithmetic number, because the mean of its divisors is an integer number (63210).

2^1804140 is an apocalyptic number.

1804140 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 1804140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3034080).

1804140 is an abundant number, since it is smaller than the sum of its proper divisors (4264020).

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

1804140 is a wasteful number, since it uses less digits than its factorization.

1804140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1804140 is about 1343.1827872631. The cubic root of 1804140 is about 121.7372289336.

It can be divided in two parts, 18041 and 40, that added together give a palindrome (18081).

The spelling of 1804140 in words is "one million, eight hundred four thousand, one hundred forty".