1800304900 has 27 divisors (see below), whose sum is σ = 3907582581. Its totient is φ = 719952240.

The previous prime is 1800304889. The next prime is 1800304907. The reversal of 1800304900 is 94030081.

The square root of 1800304900 is 42430.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 648109764 + 1152195136 = 25458^2 + 33944^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1800304907) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 422179 + ... + 426421.

Almost surely, 2^1800304900 is an apocalyptic number.

1800304900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1800304900 is the 42430-th square number.

It is an amenable number.

1800304900 is an abundant number, since it is smaller than the sum of its proper divisors (2107277681).

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

1800304900 is an frugal number, since it uses more digits than its factorization.

1800304900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500 (or 4250 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The cubic root of 1800304900 is about 1216.5090790662.

Multiplying 1800304900 by its sum of digits (25), we get a square (45007622500 = 212150²).

1800304900 divided by its sum of digits (25) gives a square (72012196 = 8486²).

Adding to 1800304900 its reverse (94030081), we get a palindrome (1894334981).

The spelling of 1800304900 in words is "one billion, eight hundred million, three hundred four thousand, nine hundred".