1804920380 has 24 divisors (see below), whose sum is σ = 3791497248. Its totient is φ = 721746368.

The previous prime is 1804920373. The next prime is 1804920391. The reversal of 1804920380 is 830294081.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1804920380.

It is a congruent number.

It is an unprimeable number.

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, 63362 + ... + 87318.

It is an arithmetic number, because the mean of its divisors is an integer number (157979052).

Almost surely, 2^1804920380 is an apocalyptic number.

1804920380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1804920380 is an abundant number, since it is smaller than the sum of its proper divisors (1986576868).

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

1804920380 is a wasteful number, since it uses less digits than its factorization.

1804920380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27733 (or 27731 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1804920380 is about 42484.3545319921. The cubic root of 1804920380 is about 1217.5477886589.

The spelling of 1804920380 in words is "one billion, eight hundred four million, nine hundred twenty thousand, three hundred eighty".