1804138028 has 48 divisors (see below), whose sum is σ = 3953644800. Its totient is φ = 699814080.

The previous prime is 1804138003. The next prime is 1804138033. The reversal of 1804138028 is 8208314081.

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, 57743 + ... + 83321.

It is an arithmetic number, because the mean of its divisors is an integer number (82367600).

Almost surely, 2^1804138028 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 1804138028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976822400).

1804138028 is an abundant number, since it is smaller than the sum of its proper divisors (2149506772).

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

1804138028 is a wasteful number, since it uses less digits than its factorization.

1804138028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25830 (or 25828 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 1804138028 is about 42475.1460032806. The cubic root of 1804138028 is about 1217.3718457899.

The spelling of 1804138028 in words is "one billion, eight hundred four million, one hundred thirty-eight thousand, twenty-eight".