1804691380 has 24 divisors (see below), whose sum is σ = 3791682720. Its totient is φ = 721527840.

The previous prime is 1804691377. The next prime is 1804691387. The reversal of 1804691380 is 831964081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804691387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22875 + ... + 64285.

It is an arithmetic number, because the mean of its divisors is an integer number (157986780).

Almost surely, 2^1804691380 is an apocalyptic number.

1804691380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1804691380 is an abundant number, since it is smaller than the sum of its proper divisors (1986991340).

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

1804691380 is a wasteful number, since it uses less digits than its factorization.

1804691380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43599 (or 43597 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1804691380 is about 42481.6593367067. The cubic root of 1804691380 is about 1217.4962941924.

The spelling of 1804691380 in words is "one billion, eight hundred four million, six hundred ninety-one thousand, three hundred eighty".