1804242920 has 16 divisors (see below), whose sum is σ = 4059546660. Its totient is φ = 721697152.

The previous prime is 1804242893. The next prime is 1804242931. The reversal of 1804242920 is 292424081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1479017764 + 325225156 = 38458^2 + 18034^2 .

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 3 ways as a sum of consecutive naturals, for example, 22552997 + ... + 22553076.

Almost surely, 2^1804242920 is an apocalyptic number.

1804242920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1804242920 is an abundant number, since it is smaller than the sum of its proper divisors (2255303740).

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

1804242920 is a wasteful number, since it uses less digits than its factorization.

1804242920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45106084 (or 45106080 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1804242920 is about 42476.3807309427. The cubic root of 1804242920 is about 1217.3954378675.

The spelling of 1804242920 in words is "one billion, eight hundred four million, two hundred forty-two thousand, nine hundred twenty".